ap_add_input_filter_handle() and ap_add_output_filter_handle()
functions for core filters


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ap_add_output_filter_handle()

There are many places in the core modules where we do
ap_add_input_filter() or ap_add_output_filter() on a
hardcoded filter name (e.g., "CORE" or "BYTERANGE").
This requires a string-to-filter mapping that wastes
CPU time.  (Even though the string lookup uses a trie
for speed, it still ranks as a big consumer of CPU time
because of the large number of filters added per request.)

The new ap_add_*_filter_handle() functions will allow
us to skip the string-to-filter mapping in cases where
the module adding the filter happens to have the
ap_filter_rec_t* for the registered filter (e.g., because
it's the same module that registered the filter in the
first place).


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               generally worked but with a memory debug build it could
               crash since some memory debuggers don't like an alloc of
               zero bytes


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subrequests

this function has been creating bogus subrequest URIs when there is
path_info for a long time.  They didn't matter until fixup_dir started
using them for URI subrequests, which led to a loop with ever growing
bogus internal URIs and filenames.


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  Function argument assignment between types "int*" and "long*"


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I haven't created the optional function to specify the cache_key yet,
That will come after this patch.

ok.. brief summary of whats changed

* new Optional Directives
	* CacheMemEntrySize -- max size of a individual entry in memory
		cache
	* CacheIgnoreNoLastMod - so we can cache mod-included files

* it tries to figure out the size of the request based on buckets if the
	content-length header isn't set

* mem_cache now caches the subprocess_env & notes tables
* the CACHE_IN/OUT/CONDITIONAL run at FTYPE_CONTENT+1, so that
	all other content filters run BEFORE the cache in.

note: the code is still experimental, and we need a bit more work
mainly...
* garbage collection
* cache stats/reporting
* manual removal of a key.


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don't pass uninitialized rv to ap_log_error as the error code


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  No.  I don't like this patch.  I like what it does [shared scoreboard
  for Windows, finally] but not how it's implemented.

  However it works, and is equally crufty to what already exists for
  win32 listeners and other exposed data within scoreboard.c.

  To do this right, we need to drop all the external references to data
  within the scoreboard, and add an accessor for remaining bits (such as
  Win32's need for direct access to the apr_shm_t.)  And within Win32,
  we need to stack all this _within_ the pre-mpm hook.  But those are
  missions in and of themselves.


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(I'm really tempted to ditch this log line altogether.)


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APR knows when to let go of those pesty kids now.


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read_request_line as these are very common place with HTTP keepalive
timeouts.


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If you need the length, you should be using apr_brigade_length.  This is
much more consistent.  Of all the places that call ap_get_brigade, only
one (ap_http_filter) needs the length.  This makes it now possible to
pass constants down without assigning them to a temporary variable first.

Also:
- Change proxy_ftp to use EXHAUSTIVE mode (didn't catch its -1 before)
- Fix buglet in mod_ssl that would cause it to return too much data in
  some circumstances


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broken.

Add a match for the WebDrive client. It is similarly broken.

Sync up the NetWare and Windows .conf files a bit.

Submitted by: Sander Striker <striker@apache.org>, Greg Stein


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compiled and linked.

* there is no UNIX symbol, so go back to #ifndef WIN32. that other
  platforms can pile on as needed until we have a proper mechanism.

* reinstate the liveprop callbacks and the dav_hooks_liveprop_fs
  structure. since the latter structure is referred to elsewhere in
  the file, it better be defined.

* use a "feature" name of DAV_FS_HAS_EXECUTABLE rather than
  conditionally specifying the property. convert the tests over to
  that symbol.


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in the core_module structure by using the AP_MODE_SPECULATIVE filter mode
to determine if MIME-continuation should occur.

Notes:
- ap_rgetline has a new prototype.
- ap_rgetline returns APR_ENOSPC when we are out of buffer space.

All direct callers of ap_rgetline are now adjusted to handle this new API.
ap_getline will mimic the old API for now.

Reviewed by:	Ryan Morgan


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Lars) and ample warning has been posted to dev@httpd.

mod_auth_dbm should be able to take over all functionality of mod_auth_db
with the AuthDBMType directive.


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platforms fixes done by wrowe).

* dav_fs_get_parent_resource(): return NULL if we're at the root of
    the URL (Location) space.

* dav_fs_dir_file_name(): make it return an error, in case we're
    passed a bad path. adjusted callers [who just ignore it for now]


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others I can't remember) weren't resolved in time.


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  The clean solution.

  Divorce dav_fs from the DAV_PROPID_FS_executable property at the
  very head of this module, and drop all references as soon as we
  determine that 'our property' isn't supported.


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  If you only mean to ask one question, why ask a dozen?

Submitted by:	Greg Stein


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  Omitted this argument and const'ness.  All looks well now.


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  Cause dav_fs_get_parent_resource to fail if the file path is entirely
  invalid or incomplete, or if it is root [determined by the platform's
  apr implemention].  Identified by Greg Stein.


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  A quick hack around Aaron's patch.  Win32 'supports' anon shm, but
  Apache's implementation requires fork().


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  Improve error reporting a bit so we might start diagnosing any faults
  that might be introduced.


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but it is definately irratating. I'll look into it if nobody beats me
to it.


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with the current solution. Thank you please drive through.


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  Our kids need a little more time here, remember, it takes a bit for
  the kernel to simply unwind 1920 threads.


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  one blank line for code, one huge step for legibility


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