CHANGES

     work however.) [Alexander Spohr <aspohr@netmatic.com>] PR#444

  *) Add a ListenBacklog directive to control the backlog parameter
     passed to listen().  Also change the default to 511 from 512.
     [Marc Slemko]

  *) API: A new handler response DONE which informs apache that the
     request has been handled and it can finish off quickly, similar to
     how it handles errors. [Rob Hartill]

  *) Turn off chunked encoding after sending terminating chunk/footer
     so that we can't do it twice by accident. [Roy Fielding]

  *) mod_expire also issues Cache-Control: max-age headers.
     [Rob Hartill]

  *) API: Added kill_only_once option for free_proc_chain so that it won't
     aggressively try to kill off specific children.  For fastcgi.
     [Stanley Gambarin <gambarin@OpenMarket.com>]

  *) mod_auth deals with extra ':' delimited fields.  [Marc Slemko]

  *) Added IconHeight and IconWidth to mod_dir's IndexOptions directive.
     When used together, these cause mod_dir to emit HEIGHT and WIDTH
     attributes in the FancyIndexing IMG tags.  [Ken Coar]

  *) PORT: Sequent and SONY NEWS-OS support added.  [Jim Jagielski]

  *) PORT: Added Windows NT support
     [Ben Laurie and Ambarish Malpani <ambarish@valicert.com>]

Changes with Apache 1.2.6

  *) mod_include when using XBitHack Full would send ETags in addition to
     sending Last-Modifieds.  This is incorrect HTTP/1.1 behaviour.
     [Dean Gaudet] PR#1133

  *) SECURITY: When a client connects to a particular port/addr, and
     gives a Host: header ensure that the virtual host requested can
     actually be reached via that port/addr.  [Ed Korthof <ed@organic.com>]

  *) Support virtual hosts with wildcard port and/or multiple ports
     properly.  [Ed Korthof <ed@organic.com>]

  *) Fixed some case-sensitivity issues according to RFC2068.
     [Dean Gaudet]

  *) Set r->allowed properly in mod_asis.c, mod_dir.c, mod_info.c,
     and mod_include.c.  [Dean Gaudet]

  *) Variable 'cwd' was being used pointlessly before being set.
     [Ken Coar] PR#1738

  *) SIGURG doesn't exist on all platforms.
     [Mark Andrew Heinrich <heinrich@tinderbox.Stanford.EDU>]

  *) When an error occurs during a POST, or other operation with a
     request body, the body has to be read from the net before allowing
     a keepalive session to continue.  [Roy Fielding] PR#1399

  *) When an error occurs in fcntl() locking suggest the user look up
     the docs for LockFile.  [Dean Gaudet]

  *) table_set() and table_unset() did not deal correctly with
     multiple occurrences of the same key. [Stephen Scheck
     <sscheck@infonex.net>, Ben Laurie] PR#1604

  *) send_fd_length() did not calculate total_bytes_sent properly in error
     cases.  [Ben Reser <breser@regnow.com>] PR#1366

  *) r->connection->user was allocated in the wrong pool causing corruption
     in some cases when used with mod_cern_meta.  [Dean Gaudet] PR#1500

  *) mod_proxy was sending HTTP/1.1 responses to ftp requests by mistake.
     Also removed the auto-generated link to www.apache.org that was the
     source of so many misdirected bug reports.  [Roy Fielding, Marc Slemko]

  *) Multiple "close" tokens may have been set in the "Connection"
     header, not an error, but a waste.
     [Ronald.Tschalaer@psi.ch] PR#1683

  *) "basic" and "digest" auth tokens should be tested case-insensitive.
     [Ronald.Tschalaer@psi.ch] PR#1599, PR#1666

  *) It appears the "257th byte" bug (see
     htdocs/manual/misc/known_client_problems.html#257th-byte) can happen
     at the 256th byte as well.  Fixed.  [Dean Gaudet]

  *) mod_rewrite would not handle %3f properly in some situations.
     [Ralf Engelschall]

  *) Apache could generate improperly chunked HTTP/1.1 responses when
     the bputc() or rputc() functions were used by modules (such as
     mod_include).  [Dean Gaudet]

  *) #ifdef wrap a few #defines in httpd.h to make life easier on
     some ports.  [Ralf Engelschall]

  *) Fix MPE compilation error in mod_usertrack.c.  [Mark Bixby]

  *) Quote CC='$(CC)' to improve recurse make calls.  [Martin Kraemer]

  *) Avoid B_ERROR redeclaration on sysvr4 systems.  [Martin Kraemer]

Changes with Apache 1.2.5

  *) SECURITY: Fix a possible buffer overflow in logresolve.  This is
     only an issue on systems without a MAXDNAME define or where 
     the resolver returns domain names longer than MAXDNAME.  [Marc Slemko]

  *) Fix an improper length in an ap_snprintf call in proxy_date_canon().
     [Marc Slemko]

  *) Fix core dump in the ftp proxy when reading incorrectly formatted
     directory listings.  [Marc Slemko]

  *) SECURITY: Fix possible minor buffer overflow in the proxy cache.
     [Marc Slemko]

  *) SECURITY: Eliminate possible buffer overflow in cfg_getline, which
     is used to read various types of files such as htaccess and 
     htpasswd files.  [Marc Slemko]

  *) SECURITY: Ensure that the buffer returned by ht_time is always
     properly null terminated.  [Marc Slemko]

  *) SECURITY: General mod_include cleanup, including fixing several
     possible buffer overflows and a possible infinite loop.  This cleanup
     was done against 1.3 code and then backported to 1.2, the result
     is a large difference (due to indentation cleanup in 1.3 code).
     Users interested in seeing a smaller set of relevant differences
     should consider comparing against src/modules/standard/mod_include.c
     from the 1.3b3 release.  Non-indentation changes to mod_include
     between 1.2 and 1.3 were minimal.  [Dean Gaudet, Marc Slemko]

  *) SECURITY: Numerous changes to mod_imap in a general cleanup
     including fixing a possible buffer overflow.  This cleanup also
     was done with 1.3 code as a basis, see the the previous note
     about mod_include.  [Dean Gaudet]

  *) SECURITY: If a htaccess file can not be read due to bad 
     permissions, deny access to the directory with a HTTP_FORBIDDEN.  
     The previous behavior was to ignore the htaccess file if it could not
     be read.  This change may make some setups with unreadable
     htaccess files stop working.  PR#817  [Marc Slemko]

  *) SECURITY: no2slash() was O(n^2) in the length of the input.  
     Make it O(n).  This inefficiency could be used to mount a denial 
     of service attack against the Apache server.  Thanks to 
     Michal Zalewski <lcamtuf@boss.staszic.waw.pl> for reporting
     this.  [Dean Gaudet]

  *) mod_include used uninitialized data for some uses of && and ||.
     [Brian Slesinsky <bslesins@wired.com>] PR#1139

  *) mod_imap should decline all non-GET methods.
     [Jay Bloodworth <jay@pathways.sde.state.sc.us>]

  *) suexec.c wouldn't build without -DLOG_EXEC. [Jason A. Dour]

  *) mod_userdir was modifying r->finfo in cases where it wasn't setting
     r->filename.  Since those two are meant to be in sync with each other
     this is a bug.  ["Paul B. Henson" <henson@intranet.csupomona.edu>]

  *) mod_include did not properly handle all possible redirects from sub-
     requests.  [Ken Coar]

  *) Inetd mode (which is buggy) uses timeouts without having setup the
     jmpbuffer. [Dean Gaudet] PR#1064

  *) Work around problem under Linux where a child will start looping
     reporting a select error over and over.
     [Rick Franchuk <rickf@transpect.net>] PR#1107

Changes with Apache 1.2.4

  *) The ProxyRemote change in 1.2.3 introduced a bug resulting in the proxy
     always making requests with the full-URI instead of just the URI path.
     [Marc Slemko, Roy Fielding]

  *) Add -lm for AIX versions >= 4.2 to allow Apache to link properly
     on this platform.  [Marc Slemko]

Changes with Apache 1.2.3

  *) The request to a remote proxy was mangled if it was generated as the
     result of a ProxyPass directive. URL schemes other than http:// were not
     supported when ProxyRemote was used. PR#260, PR#656, PR#699, PR#713,
     PR#812 [Lars Eilebrecht]

  *) Fixed proxy-pass-through feature of mod_rewrite; Added error logging
     information for case where proxy module is not available. [Marc Slemko]

  *) Force proxy to always respond as HTTP/1.0, which it was failing to
     do for errors and cached responses.  [Roy Fielding]

  *) PORT: Improved support for ConvexOS 11.  [Jeff Venters]

Changes with Apache 1.2.2 [not released]

  *) Fixed another long-standing bug in sub_req_lookup_file where it would
     happily skip past access checks on subdirectories looked up with relative
     paths.  (It's used by mod_dir, mod_negotiation, and mod_include.)
     [Dean Gaudet]

  *) Add lockfile name to error message printed out when
     USE_FLOCK_SERIALIZED_ACCEPT is defined.
     [Marc Slemko]

  *) Enhanced the chunking and error handling inside the buffer functions.
     [Dean Gaudet, Roy Fielding]

  *) When merging the main server's <Directory> and <Location> sections into
     a vhost, put the main server's first and the vhost's second.  Otherwise
     the vhost can't override the main server.  [Dean Gaudet] PR#717

  *) The <Directory> code would merge and re-merge the same section after
     a match was found, possibly causing problems with some modules.
     [Dean Gaudet]

  *) Fixed an infinite loop in mod_imap for references above the server root.
     [Dean Gaudet] PR#748

  *) mod_include cleanup showed that handle_else was being used to handle
     endif.  It didn't cause problems, but it was cleaned up too.
     [Howard Fear]

  *) Last official synchronization of mod_rewrite with author version (because
     mod_rewrite is now directly developed by the author at the Apache Group):
     o added diff between mod_rewrite 3.0.6+ and 3.0.9
       minus WIN32/NT stuff, but plus copyright removement.
       In detail:
       - workaround for detecting infinite rewriting loops
       - fixed setting of env vars when "-" is used as subst string
       - fixed forced response code on redirects (PR#777)
       - fixed cases where r->args is ""
       - kludge to disable locking on pipes under braindead SunOS
       - fix for rewritelog in cases where remote hostname is unknown
       - fixed totally damaged request_rec walk-back loop
     o remove static from local data and add static to global ones.
     o replaced ugly proxy finding stuff by simple
       find_linked_module("mod_proxy") call.
     o added missing negation char on rewritelog()
     o fixed a few comment typos
     [Ralf S. Engelschall]

  *) Anonymous_LogEmail was logging on each subrequest.
     [Dean Gaudet] PR#421, PR#868

  *) "force-response-1.0" now only applies to requests which are HTTP/1.0 to
     begin with.  "nokeepalive" now works for HTTP/1.1 clients.  Added
     "downgrade-1.0" which causes Apache to pretend it received a 1.0.
     Additionally mod_browser now triggers during translate_name to workaround
     a deficiency in the header_parse phase.
     [Dean Gaudet] PR#875

  *) get_client_block() returns wrong length if policy is 
     REQUEST_CHUNKED_DECHUNK.
     [Kenichi Hori <ken@d2.bs1.fc.nec.co.jp>] PR#815

  *) Properly treat <files> container like other containers in mod_info.
     [Marc Slemko] PR#848

  *) The proxy didn't treat the "Host:" keyword of the host header as case-
     insensitive.  The proxy would corrupt the first line of a response from
     an HTTP/0.9 server.  [Kenichi Hori <ken@d2.bs1.fc.nec.co.jp>] PR#813,814

  *) mod_include would log some bogus values occasionally.
     [Skip Montanaro <skip@calendar.com>, Marc Slemko] PR#797

  *) PORT: The slack fd changes in 1.2.1 introduced a problem with SIGHUP
     under Solaris 2.x (up through 2.5.1).  It has been fixed.
     [Dean Gaudet] PR#832

  *) API: In HTTP/1.1, whether or not a request message contains a body
     is independent of the request method and based solely on the presence
     of a Content-Length or Transfer-Encoding.  Therefore, our default
     handlers need to be prepared to read a body even if they don't know
     what to do with it; otherwise, the body would be mistaken for the
     next request on a persistent connection.  discard_request_body()
     has been added to take care of that.  [Roy Fielding] PR#378

  *) API: Symbol APACHE_RELEASE provides a numeric form of the Apache
     release version number, such that it always increases along the
     same lines as our source code branching.  [Roy Fielding]

  *) Minor oversight on multiple variants fixed.  [Paul Sutton] PR#94

Changes with Apache 1.2.1

  *) SECURITY: Don't serve file system objects unless they are plain files,
     symlinks, or directories.  This prevents local users from using pipes
     or named sockets to invoke programs for an extremely crude form of
     CGI.  [Dean Gaudet]

  *) SECURITY: HeaderName and ReadmeName were settable in .htaccess and
     could contain "../" allowing a local user to "publish" any file on
     the system.  No slashes are allowed now.  [Dean Gaudet]

  *) SECURITY: It was possible to violate the symlink Options using mod_dir
     (headers, readmes, titles), mod_negotiation (type maps), or
     mod_cern_meta (meta files).  [Dean Gaudet]

  *) SECURITY: Apache will refuse to run as "User root" unless
     BIG_SECURITY_HOLE is defined at compile time.  [Dean Gaudet]

  *) CONFIG: If a symlink pointed to a directory then it would be disallowed
     if it contained a .htaccess disallowing symlinks.  This is contrary
     to the rule that symlink permissions are tested with the symlink
     options of the parent directory.  [Dean Gaudet] PR#353

  *) CONFIG: The LockFile directive can be used to place the serializing
     lockfile in any location.  It previously defaulted to /usr/tmp/htlock.
     [Somehow it took four of us: Randy Terbush, Jim Jagielski, Dean Gaudet,
     Marc Slemko]

  *) Request processing now retains state of whether or not the request
     body has been read, so that internal redirects and subrequests will
     not try to read it twice (and block). [Roy Fielding]

  *) Add a placeholder in modules/Makefile to avoid errors with certain
     makes. [Marc Slemko]

  *) QUERY_STRING was unescaped in mod_include, it shouldn't be.
     [Dean Gaudet] PR#644

  *) mod_include was not properly changing the current directory.
     [Marc Slemko] PR#742

  *) Attempt to work around problems with third party libraries that do not
     handle high numbered descriptors (examples include bind, and
     solaris libc).  On all systems apache attempts to keep all permanent
     descriptors above 15 (called the low slack line).  Solaris users
     can also benefit from adding -DHIGH_SLACK_LINE=256 to EXTRA_CFLAGS
     which keeps all non-FILE * descriptors above 255.  On all systems
     this should make supporting large numbers of vhosts with many open
     log files more feasible.  If this causes trouble please report it,
     you can disable this workaround by adding -DNO_SLACK to EXTRA_CFLAGS.
     [Dean Gaudet] various PRs

  *) Related to the last entry, network sockets are now opened before
     log files are opened.  The only known case where this can cause
     problems is under Solaris with many virtualhosts and many Listen
     directives.  But using -DHIGH_SLACK_LINE=256 described above will
     work around this problem.  [Dean Gaudet]

  *) USE_FLOCK_SERIALIZED_ACCEPT is now default for FreeBSD, A/UX, and
     SunOS 4.

  *) Improved unix error response logging.  [Marc Slemko]

  *) Update mod_rewrite from 3.0.5 to 3.0.6.  New ruleflag
     QSA=query_string_append.  Also fixed a nasty bug in per-dir context:
     when a URL http://... was used in conjunction with a special
     redirect flag, e.g. R=permanent, the permanent status was lost.
     [Ronald Tschalaer <Ronald.Tschalaer@psi.ch>, Ralf S. Engelschall]

  *) If an object has multiple variants that are otherwise equal Apache
     would prefer the last listed variant rather than the first.
     [Paul Sutton] PR#94

  *) "make clean" at the top level now removes *.o.  [Dean Gaudet] PR#752

  *) mod_status dumps core in inetd mode.  [Marc Slemko and Roy Fielding]
     PR#566

  *) pregsub had an off-by-1 in its error checking code. [Alexei Kosut]

  *) PORT: fix rlim_t problems with AIX 4.2. [Marc Slemko] PR#333

  *) PORT: Update UnixWare support for 2.1.2.
     [Lawrence Rosenman <ler@lerctr.org>] PR#511

  *) PORT: NonStop-UX [Joachim Schmitz <schmitz_joachim@tandem.com>] PR#327

  *) PORT: Update ConvexOS support for 11.5.
     [David DeSimone <fox@convex.com>] PR#399

  *) PORT: Support for DEC cc compiler under ULTRIX.
     ["P. Alejandro Lopez-Valencia" <alejolo@ideam.gov.co>] PR#388

  *) PORT: Support for Maxion/OS SVR4.2 Real Time Unix. [no name given] PR#383

  *) PORT: Workaround for AIX 3.x compiler bug in http_bprintf.c.  
     [Marc Slemko] PR#725

  *) PORT: fix problem compiling http_bprintf.c with gcc under SCO
     [Marc Slemko] PR#695

Changes with Apache 1.2

Changes with Apache 1.2b11

  *) Fixed open timestamp fd in proxy_cache.c [Chuck Murcko]

  *) Added undocumented perl SSI mechanism for -DUSE_PERL_SSI and mod_perl.
     [Doug MacEachern, Rob Hartill]

  *) Proxy needs to use hard_timeout instead of soft_timeout when it is
     reading from one buffer and writing to another, at least until it has
     a custom timeout handler.  [Roy Fielding and Petr Lampa]

  *) Fixed problem on IRIX with servers hanging in IdentityCheck,
     apparently due to a mismatch between sigaction and setjmp.
     [Roy Fielding] PR#502

  *) Log correct status code if we timeout before receiving a request (408)
     or if we received a request-line that was too long to process (414).
     [Ed Korthof and Roy Fielding] PR#601

  *) Virtual hosts with the same ServerName, but on different ports, were
     not being selected properly.  [Ed Korthof]

  *) Added code to return the requested IP address from proxy_host2addr()
     if gethostbyaddr() fails due to reverse DNS lookup problems. Original
     change submitted by Jozsef Hollosi <hollosi@sbcm.com>.
     [Chuck Murcko] PR#614

  *) If multiple requests on a single connection are used to retrieve
     data from different virtual hosts, the virtual host list would be
     scanned starting with the most recently used VH instead of the first,
     causing most virtual hosts to be ignored.
     [Paul Sutton and Martin Mares] PR#610

  *) The OS/2 handling of process group was broken by a porting patch for
     MPE, so restored prior code for OS/2.  [Roy Fielding and Garey Smiley]

  *) Inherit virtual server port from main server if none (or "*") is
     given for VirtualHost.  [Dean Gaudet] PR#576

  *) If the lookup for a DirectoryIndex name with content negotiation
     has found matching variants, but none are acceptable, return the
     negotiation result if there are no more DirectoryIndex names to lookup.
     [Petr Lampa and Roy Fielding]

  *) If a soft_timeout occurs after keepalive is set, then the main child
     loop would try to read another request even though the connection
     has been aborted.  [Roy Fielding]

  *) Configure changes: Allow for whitespace at the start of a
     Module declaration. Also, be more understanding about the
     CC=/OPTIM= format in Configuration. Finally, fix compiler
     flags if using HP-UX's cc compiler. [Jim Jagielski]

  *) Subrequests and internal redirects now inherit the_request from the
     original request-line. [Roy Fielding]

  *) Test for error conditions before creating output header fields, since
     we don't want the error message to include those fields.  Likewise,
     reset the content_language(s) and content_encoding of the response
     before generating or redirecting to an error message, since the new
     message will have its own Content-* definitions. [Dean Gaudet]

  *) Restored the semantics of headers_out (headers sent only with 200..299
     and 304 responses) and err_headers_out (headers sent with all responses).
     Avoid the overhead of copying tables if err_headers_out is empty
     (the usual case).  [Roy Fielding]

  *) Fixed a couple places where a check for the default Content-Type was
     not properly checking both the value configured by the DefaultType
     directive and the DEFAULT_TYPE symbol in httpd.h.  Changed the value
     of DEFAULT_TYPE to match the documented default (text/plain).
     [Dean Gaudet] PR#506

  *) Escape the HTML-sensitive characters in the Request-URI that is
     output for each child by mod_status. [Dean Gaudet and Ken Coar] PR#501

  *) Properly initialize the flock structures used by the mutex locking
     around accept() when USE_FCNTL_SERIALIZED_ACCEPT is defined.
     [Marc Slemko]

  *) The method for determining PATH_INFO has been restored to the pre-1.2b
     (and NCSA httpd) definition wherein it was the extra path info beyond
     the CGI script filename.  The environment variable FILEPATH_INFO has
     been removed, and instead we supply the original REQUEST_URI to any
     script that wants to be Apache-specific and needs the real URI path.
     This solves a problem with existing scripts that use extra path info
     in the ScriptAlias directive to pass options to the CGI script.
     [Roy Fielding]

  *) The _default_ change in 1.2b10 will change the behaviour on configs
     that use multiple Listen statements for listening on multiple ports.
     But that change is necessary to make _default_ consistent with other
     forms of <VirtualHost>.  It requires such configs to be modified
     to use <VirtualHost _default_:*>.  The documentation has been
     updated.  [Dean Gaudet] PR#530

  *) If an ErrorDocument CGI script is used to respond to an error
     generated by another CGI script which has already read the message
     body of the request, the server would block trying to read the
     message body again.  [Rob Hartill]

  *) signal() replacement conflicted with a define on QNX (and potentially
     other platforms). Fixed. [Ben Laurie] PR#512

Changes with Apache 1.2b10

  *) Allow HTTPD_ROOT, SERVER_CONFIG_FILE, DEFAULT_PATH, and SHELL_PATH
     to be configured via -D in Configuration.  [Dean Gaudet] PR#449

  *) <VirtualHost _default_:portnum> didn't work properly.  [Dean Gaudet]

  *) Added prototype for mktemp() for SUNOS4 [Marc Slemko]

  *) In mod_proxy.c, check return values for proxy_host2addr() when reading
     config, in case the hostent struct returned is trash.
     [Chuck Murcko] PR #491

  *) Fixed the fix in 1.2b9 for parsing URL query info into args for CGI
     scripts.  [Dean Gaudet, Roy Fielding, Marc Slemko]

Changes with Apache 1.2b9  [never announced]

  *) Reset the MODULE_MAGIC_NUMBER to account for the unsigned port
     changes and in anticipation of 1.2 final release.  [Roy Fielding]

  *) Fix problem with scripts not receiving a SIGPIPE when client drops
     the connection (e.g., when user presses Stop).  Apache will now stop
     trying to send a message body immediately after an error from write.
     [Roy Fielding and Nathan Kurz] PR#335

  *) Rearrange Configuration.tmpl so that mod_rewrite has higher priority
     than mod_alias, and mod_alias has higher priority than mod_proxy;
     rearranged other modules to enhance understanding of their purpose
     and relative order (and maybe even reduce some overhead).
     [Roy Fielding and Sameer Parekh]

  *) Fix graceful restart.  Eliminate many signal-related race
     conditions in both forms of restart, and in SIGTERM.  See
     htdocs/manual/stopping.html for details on stopping and
     restarting the parent.  [Dean Gaudet]

  *) Fix memory leaks in mod_rewrite, mod_browser, mod_include.  Tune
     memory allocator to avoid a behaviour that required extra blocks to
     be allocated.  [Dean Gaudet]

  *) Allow suexec to access files relative to current directory but not
     above.  (Excluding leading / or any .. directory.)  [Ken Coar]
     PR#269, 319, 395

  *) Fix suexec segfault when group doesn't exist. [Gregory Neil Shapiro]
     PR#367, 368, 354, 453

  *) Fix the above fix: if suexec is enabled, avoid destroying r->url
     while obtaining the /~user and save the username in a separate data
     area so that it won't be overwritten by the call to getgrgid(), and
     fix some misuse of the pool string allocation functions.  Also fixes
     a general problem with parsing URL query info into args for CGI scripts.
     [Roy Fielding] PR#339, 367, 354, 453

  *) Fix IRIX warning about bzero undefined. [Marc Slemko]

  *) Fix problem with <Directory proxy:...>. [Martin Kraemer] PR#271

  *) Corrected spelling of "authoritative".  AuthDBAuthoratative became
     AuthDBAuthoritative. [Marc Slemko] PR#420

  *) MaxClients should be at least 1. [Lars Eilebrecht] PR#375

  *) The default handler now logs invalid methods or URIs (i.e. PUT on an
     object that can't be PUT, or FOOBAR for some method FOOBAR that
     apache doesn't know about at all).  Log 404s that occur in mod_include.
     [Paul Sutton, John Van Essen]

  *) If a soft timeout (or lingerout) occurs while trying to flush a
     buffer or write inside buff.c or fread'ing from a CGI's output,
     then the timeout would be ignored. [Roy Fielding] PR#373

  *) Work around a bug in Netscape Navigator versions 2.x, 3.x and 4.0b2's
     parsing of headers.  If the terminating empty-line CRLF occurs starting
     at the 256th or 257th byte of output, then Navigator will think a normal
     image is invalid.  We are guessing that this is because their initial
     read of a new request uses a 256 byte buffer. We check the bytes written
     so far and, if we are about to tickle the bug, we instead insert a
     padding header of eminent bogosity. [Roy Fielding and Dean Gaudet] PR#232

  *) Fixed SIGSEGV problem when a DirectoryIndex file is also the source
     of an external redirection.  [Roy Fielding and Paul Sutton]

  *) Configure would create a broken Makefile if the configuration file
     contained a commented-out Rule.  [Roy Fielding]

  *) Promote per_dir_config and subprocess_env from the subrequest to the
     main request in mod_negotiation.  In particular this fixes a bug
     where <Files> sections wouldn't properly apply to negotiated content.
     [Dean Gaudet]

  *) Fix a potential deadlock in mod_cgi script_err handling.
     [Ralf S. Engelschall]

  *) rotatelogs zero-pads the logfile names to improve alphabetic sorting.
     [Mitchell Blank Jr]

  *) Updated mod_rewrite to 3.0.4: Fixes HTTP redirects from within
     .htaccess files because the RewriteBase was not replaced correctly.
     Updated mod_rewrite to 3.0.5: Fixes problem with rewriting inside
     <Directory> sections missing a trailing /.  [Ralf S. Engelschall]

  *) Clean up Linux settings in conf.h by detecting 2.x versus 1.x.  For
     1.x the settings are those of pre-1.2b8.  For 2.x we include
     USE_SHMGET_SCOREBOARD (scoreboard in shared memory rather than file) and
     HAVE_SYS_RESOURCE_H (enable the RLimit commands).
     [Dean Gaudet] PR#336, PR#340

  *) Redirect did not preserve ?query_strings when present in the client's
     request.  [Dean Gaudet]

  *) Configure was finding non-modules on EXTRA_LIBS. [Frank Cringle] PR#380

  *) Use /bin/sh5 on ULTRIX.  [P. Alejandro Lopez-Valencia] PR#369

  *) Add UnixWare compile/install instructions.  [Chuck Murcko]

  *) Add mod_example (illustration of API techniques).  [Ken Coar]

  *) Add macro for memmove to conf.h for SUNOS4. [Marc Slemko]

  *) Improve handling of directories when filenames have spaces in them.
     [Chuck Murcko]

  *) For hosts with multiple IP addresses, try all additional addresses if
     necessary to get a connect. Fail only if hostent address list is
     exhausted. [Chuck Murcko]

  *) More signed/unsigned port fixes.  [Dean Gaudet]

  *) HARD_SERVER_LIMIT can be defined in the Configuration file now.
     [Dean Gaudet]

Changes with Apache 1.2b8

  *) suexec.c doesn't close the log file, allowing CGIs to continue writing
     to it.  [Marc Slemko]

  *) The addition of <Location> and <File> directives made the
     sub_req_lookup_simple() function bogus, so we now handle
     the special cases directly.  [Dean Gaudet]

  *) We now try to log where the server is dumping core when a fatal
     signal is received.  [Ken Coar]

  *) Improved lingering_close by adding a special timeout, removing the
     spurious log messages, removing the nonblocking settings (they
     are not needed with the better timeout), and adding commentary
     about the NO_LINGCLOSE and USE_SO_LINGER issues.  NO_LINGCLOSE is
     now the default for SunOS4, UnixWare, NeXT, and IRIX.  [Roy Fielding]

  *) Send error messages about setsockopt failures to the server error
     log instead of stderr.  [Roy Fielding]

  *) Fix loopholes in proxy cache expiry vis a vis alarms. [Brian Moore]

  *) Stopgap solution for CGI 3-second delay with server-side includes: if
     processing a subrequest, allocate memory from r->main->pool instead
     of r->pool so that we can avoid waiting for free_proc_chain to cleanup
     in the middle of an SSI request.  [Dean Gaudet] PR #122

  *) Fixed status of response when POST is received for a nonexistent URL
     (was sending 405, now 404) and when any method is sent with a
     full-URI that doesn't match the server and the server is not acting
     as a proxy (was sending 501, now 403).  [Roy Fielding]

  *) Host port changed to unsigned short. [Ken Coar] PR #276

  *) Fix typo in command definition of AuthAuthoritative. [Ken Coar] PR #246

  *) Defined USE_SHMGET_SCOREBOARD for shared memory on Linux.  [Dean Gaudet]

  *) Report extra info from errno with many errors that cause httpd to exit.
     spawn_child, popenf, and pclosef now have valid errno returns in the
     event of an error.  Correct problems where errno was stomped on
     before being reported.  [Dean Gaudet]

  *) In the proxy, if the cache filesystem was full, garbage_coll() was
     never called, and thus the filesystem would remain full indefinitely.
     We now also remove incomplete cache files left if the origin server
     didn't send a Content-Length header and either the client has aborted
     transfer or bwrite() to client has failed. [Petr Lampa]

  *) Fixed the handling of module and script-added header fields.
     Improved the interface for sending header fields and reduced
     the duplication of code between sending okay responses and errors.
     We now always send both headers_out and err_headers_out, and
     ensure that the server-reserved fields are not being overridden,
     while not overriding those that are not reserved.  [Roy Fielding]

  *) Moved transparent content negotiation fields to err_headers_out
     to reflect above changes.  [Petr Lampa]

  *) Fixed the determination of whether or not we should make the
     connection persistent for all of the cases where some other part
     of the server has already indicated that we should not.  Also
     improved the ordering of the test so that chunked encoding will
     be set whenever it is desired instead of only when KeepAlive
     is enabled. Added persistent connection capability for most error
     responses (those that do not indicate a bad input stream) when
     accessed by an HTTP/1.1 client. [Roy Fielding]

  *) Added missing timeouts for sending header fields, error responses,
     and the last chunk of chunked encoding, each of which could have
     resulted in a process being stuck in write forever.  Using soft_timeout
     requires that the sender check for an aborted connection rather than
     continuing after an EINTR.  Timeouts that used to be initiated before
     send_http_header (and never killed) are now initiated only within or
     around the routines that actually do the sending, and not allowed to
     propagate above the caller.  [Roy Fielding]

  *) mod_auth_anon required an @ or a . in the email address, not both.
     [Dirk vanGulik]

  *) per_dir_defaults weren't set correctly until directory_walk for
     name-based vhosts.  This fixes an obscure bug with the wrong config
     info being used for vhosts that share the same ip as the server.
     [Dean Gaudet]

  *) Improved generation of modules/Makefile to be more generic for
     new module directories. [Ken Coar, Chuck Murcko, Roy Fielding]

  *) Generate makefile dependency for Configuration based on the actual
     name given when running the Configure process.  [Dean Gaudet]

  *) Fixed problem with vhost error log not being set prior to
     initializing virtual hosts. [Dean Gaudet]

  *) Fixed infinite loop when a trailing slash is included after a type map
     file URL (extra path info). [Petr Lampa]

  *) Fixed server status updating of per-connection counters. [Roy Fielding]

  *) Add documentation for DNS issues (reliability and security), and try
     to explain the virtual host matching process.  [Dean Gaudet]

  *) Try to continue gracefully by disabling the vhost if a DNS lookup
     fails while parsing the configuration file.  [Dean Gaudet]

  *) Improved calls to setsockopt.  [Roy Fielding]

  *) Negotiation changes: Don't output empty content-type in variant list;
     Output charset in variant list; Return sooner from handle_multi() if
     no variants found; Add handling of '*' wildcard in Accept-Charset.
     [Petr Lampa and Paul Sutton]

  *) Fixed overlaying of request/sub-request notes and headers in
     mod_negotiation.  [Dean Gaudet]

  *) If two variants' charset quality are equal and one is the default
     charset (iso-8859-1), then prefer the variant that was specifically
     listed in Accept-Charset instead of the default.  [Petr Lampa]

  *) Memory allocation problem in push_array() -- it would corrupt memory
     when nalloc==0.  [Kai Risku <krisku@tf.hut.fi> and Roy Fielding]

  *) invoke_handler() doesn't handle mime arguments in content-type
     [Petr Lampa] PR#160

  *) Reduced IdentityCheck timeout to 30 seconds, as per RFC 1413 minimum.
     [Ken Coar]

  *) Fixed problem with ErrorDocument not working for virtual hosts
     due to one of the performance changes in 1.2b7. [Dean Gaudet]

  *) Log an error message if we get a request header that is too long,
     since it may indicate a buffer overflow attack. [Marc Slemko]

  *) Made is_url() allow "[-.+a-zA-Z0-9]+:" as a valid scheme and
     not reject URLs without a double-slash, as per RFC2068 section 3.2.
     [Ken Coar] PR #146, #187

  *) Added table entry placeholder for new header_parser callback
     in all of the distributed modules. [Ken Coar] PR #191

  *) Allow for cgi files without the .EXE extension on them under OS/2.
     [Garey Smiley] PR #59

  *) Fixed error message when resource is not found and URL contains
     path info. [Petr Lampa and Dean Gaudet] PR #40

  *) Fixed user and server confusion over what should be a virtual host
     and what is the main server, resulting in access to something
     other than the name defined in the virtualhost directive (but
     with the same IP address) failing. [Dean Gaudet]

  *) Updated mod_rewrite to version 3.0.2, which: fixes compile error on
     AIX; improves the redirection stuff to enable the users to generally
     redirect to http, https, gopher and ftp; added TIME variable for
     RewriteCond which expands to YYYYMMDDHHMMSS strings and added the
     special patterns >STRING, <STRING and =STRING to RewriteCond, which
     can be used in conjunction with %{TIME} or other variables to create
     time-dependent rewriting rules. [Ralf S. Engelschall]

  *) bpushfd() no longer notes cleanups for the file descriptors it is handed.
     Module authors may need to adjust their code for proper cleanup to take
     place (that is, call note_cleanups_for_fd()). This change fixes problems
     with file descriptors being erroneously closed when the proxy module was
     in use. [Ben Laurie]

  *) Fix bug in suexec reintroduced by changes in 1.2b7 which allows
     initgroups() to hose the group information needed for later
     comparisons. [Randy Terbush]

  *) Remove unnecessary call to va_end() in create_argv() which
     caused a SEGV on some systems.

  *) Use proper MAXHOSTNAMELEN symbol for limiting length of server name.
     [Dean Gaudet]

  *) Clear memory allocated for listeners. [Randy Terbush]

  *) Improved handling of IP address as a virtualhost address and
     introduced "_default_" as a synonym for the default vhost config.
     [Dean Gaudet] PR #212

Changes with Apache 1.2b7

  *) Port to  UXP/DS(V20) [Toshiaki Nomura <nom@yk.fujitsu.co.jp>]

  *) unset Content-Length if chunked (RFC-2068) [Petr Lampa]

  *) mod_negotiation fixes [Petr Lampa] PR#157, PR#158, PR#159
     - replace protocol response numbers with symbols
     - save variant-list into main request notes
     - free allocated memory from subrequests
     - merge notes, headers_out and err_headers_out

  *) changed status check mask in proxy_http.c from "HTTP/#.# ### *" to
     "HTTP/#.# ###*" to be more lenient about what we accept.
     [Chuck Murcko]

  *) more proxy FTP bug fixes:
     - Changed send_dir() to remove user/passwd from displayed URL.
     - Changed login error messages to be more descriptive.
     - remove setting of SO_DEBUG socket option
     - Make ftp_getrc() more lenient about multiline responses,
       specifically, 230 responses which don't have continuation 230-
       on each line). These seem to be all NT FTP servers, and while
       perhaps questionable, they appear to be legal by RFC 959.
     - Add missing kill_timeout() after transfer to user completes.
     [Chuck Murcko]

  *) Fixed problem where a busy server could hang when restarting
     after being sent a SIGHUP due to child processes not exiting.
     [Marc Slemko]

  *) Modify mod_include escaping so a '\' only signifies an escaped
     character if the next character is one that needs
     escaping.  [Ben Laurie]

  *) Eliminated possible infinite loop in mod_imap when relative URLs are
     used with a 'base' directive that does not have a '/' in it.
     [Marc Slemko, reported by Onno Witvliet <onno@tc.hsa.nl>]

  *) Reduced the default timeout from 1200 seconds to 300, and the
     one in the sample configfile from 400 to 300.  [Marc Slemko]

  *) Stop vbprintf from crashing if given a NULL string pointer;
     print (null) instead.  [Ken Coar]

  *) Don't disable Nagle algorithm if system doesn't have TCP_NODELAY.
     [Marc Slemko and Roy Fielding]

  *) Fixed problem with mod_cgi-generated internal redirects trying to
     read the request message-body twice. [Archie Cobbs and Roy Fielding]

  *) Reduced timeout on lingering close, removed possibility of a blocked
     read causing the child to hang, and stopped logging of errors if
     the socket is not connected (reset by client).  [Roy Fielding]

  *) Rearranged main child loop to remove duplication of code in
     select/accept and keep-alive requests, fixed several bugs regarding
     checking scoreboard_image for exit indication and failure to
     account for all success conditions and trap all error conditions,
     prevented multiple flushes before closing the socket; close the entire
     socket buffer instead of just one descriptor, prevent logging of
     EPROTO and ECONNABORTED on platforms where supported, and generally
     improved readability.  [Roy Fielding]

  *) Extensive performance improvements. Cleaned up inefficient use of
     auto initializers, multiple is_matchexp calls on a static string,
     and excessive merging of response_code_strings. [Dean Gaudet]

  *) Added double-buffering to mod_include to improve performance on
     server-side includes. [Marc Slemko]

  *) Several fixes for suexec wrapper. [Randy Terbush]
     - Make wrapper work for files on NFS filesystem.
     - Fix portability problem of MAXPATHLEN.
     - Fix array overrun problem in clean_env().
     - Fix allocation of PATH environment variable

  *) Removed extraneous blank line is description of mod_status chars.
     [Kurt Kohler]

  *) Logging of errors from the call_exec routine simply went nowhere,
     since the logfile fd has been closed, so now we send them to stderr.
     [Harald T. Alvestrand]

  *) Fixed core dump when DocumentRoot is a CGI.
     [Ben Laurie, reported by geddis@tesserae.com]

  *) Fixed potential file descriptor leak in mod_asis; updated it and
     http_core to use pfopen/pfclose instead of fopen/fclose.
     [Randy Terbush and Roy Fielding]

  *) Fixed handling of unsigned ints in ap_snprintf() on some chips such
     as the DEC Alpha which is 64-bit but uses 32-bit ints.
     [Dean Gaudet and Ken Coar]

  *) Return a 302 response code to the client when sending a redirect
     due to a missing trailing '/' on a directory instead of a 301; now
     it is cacheable. [Markus Gyger]

  *) Fix condition where, if a bad directive occurs in .htaccess, and
     sub_request() goes first to this directory, then log_reason() will
     SIGSEGV because it doesn't have initialized r->per_dir_config.
     [PR#162 from Petr Lampa, fix by Marc Slemko and Dean Gaudet]

  *) Fix handling of lang_index in is_variant_better().  This was
     causing problems which resulted in the server sending the
     wrong language document in some cases. [Petr Lampa]

  *) Remove free() from clean_env() in suexec wrapper. This was nuking
     the clean environment on some systems.

  *) Tweak byteserving code (e.g. serving PDF files) to work around
     bugs in Netscape Navigator and Microsoft Internet Explorer.
     Emit Content-Length header when sending multipart/byteranges.
     [Alexei Kosut]

  *) Port to HI-UX/WE2. [Nick Maclaren]

  *) Port to HP MPE operating system for HP 3000 machines
     [Mark Bixby <markb@cccd.edu>]

  *) Fixed bug which caused a segmentation fault if only one argument
     given to RLimit* directives. [Ed Korthof]

  *) Continue persistent connection after 204 or 304 response. [Dean Gaudet]

  *) Improved buffered output to the client by delaying the flush decision
     until the BUFF code is actually about to read the next request.
     This fixes a problem introduced in 1.2b5 with clients that send
     an extra CRLF after a POST request. Also improved chunked output
     performance by combining writes using writev() and removing as
     many bflush() calls as possible.  NOTE: Platforms without writev()
     must add -DNO_WRITEV to the compiler CFLAGS, either in Configuration
     or Configure, unless we have already done so.  [Dean Gaudet]

  *) Fixed mod_rewrite bug which truncated the rewritten URL [Marc Slemko]

  *) Fixed mod_info output corruption bug introduced by buffer overflow
     fixes. [Dean Gaudet]

  *) Fixed http_protocol to correctly output all HTTP/1.1 headers, including
     for the special case of a 304 response.  [Paul Sutton]

  *) Improved handling of TRACE method by bypassing normal method handling
     and header parsing routines; fixed Allow response to always allow TRACE.
     [Dean Gaudet]

  *) Fixed compiler warnings in the regex library. [Dean Gaudet]

  *) Cleaned-up some of the generated HTML. [Ken Coar]

Changes with Apache 1.2b6

  *) Allow whitespace in imagemap mapfile coordinates. [Marc Slemko]

  *) Fix typo introduced in fix for potential infinite loop around
     accept() in child_main(). This change caused the rev to 1.2b6.
     1.2b5 was never a public beta.

Changes with Apache 1.2b5

  *) Change KeepAlive semantics (On|Off instead of a number), add
     MaxKeepAliveRequests directive. [Alexei Kosut]

  *) Various NeXT compilation patches, as well as a change in
     regex/regcomp.c since that file also used a NEXT define.
     [Andreas Koenig]

  *) Allow * to terminate the end of a directory match in mod_dir.
     Allows /~* to match for both /~joe and /~joe/. [David Bronder]

  *) Don't call can_exec() if suexec_enabled. Calling this requires
     scripts executed by the suexec wrapper to be world executable, which
     defeats one of the advantages of running the wrapper. [Randy Terbush]

  *) Portability Fix: IRIX complained with 'make clean' about *pure* (removed)
     [Jim Jagielski]

  *) Migration from sprintf() to snprintf() to avoid buffer
     overflows. [Marc Slemko]

  *) Provide portable snprintf() implementation (ap_snprintf)
     as well as *cvt family. [Jim Jagielski]

  *) Portability Fix: NeXT lacks unistd.h so we wrap it's inclusion
     [Jim Jagielski]

  *) Remove mod_fastcgi.c from the distribution. This module appears