*) add the "install_filter" hook as a hook/control point for modules to
   install their filters. [Ryan Bloom]

http_protocol.c:
*) move check_first_conn_error() up in the file; no actual changes
*) add checked_bputstrs(), checked_bflush(), and checked_bputs(). These are
   copies of ap_rvputs(), ap_rflush(), and ap_rputs() respectively. The
   users of the checked_* functions will be independent of filtering changes
   to the ap_r* functions.
*) add flush_filters() place holder


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85685 13f79535-47bb-0310-9956-ffa450edef68

. check proper error variable when handling errors from ap_write(pipe_of_death)
. log proper error variable after ap_poll() failure
. ditto for ap_create_pipe() failures
. ditto for ap_set_pipe_timeout() failures
Stylistic change:
. pass 0 instead of errno to ap_log_error when APLOG_NOERRNO is specified


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85684 13f79535-47bb-0310-9956-ffa450edef68

Fix bad ap_log_error() argument list.
Pass correct error code from ap_poll().


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85683 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85682 13f79535-47bb-0310-9956-ffa450edef68

Submitted by:	Greg Ames


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85681 13f79535-47bb-0310-9956-ffa450edef68

descriptors for connected sockets are too big.

Todo: The BeOS MPMs seem to have the same issue.


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allows us to use APR_SOCKETS_AS_FILES to poll on an APR socket.  Finally,
this makes the MPM more portable, because it is now always possible to set
the pipe to be non-blocking.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85676 13f79535-47bb-0310-9956-ffa450edef68

works again.  It is completely hosed at the moment.

Todo: remove the need for this call.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85675 13f79535-47bb-0310-9956-ffa450edef68

Submitted by:	Victor Orlikowski
Reviewed by:	Bill Stoddard


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85674 13f79535-47bb-0310-9956-ffa450edef68

a bug I introduced earlier today, because it uses the APR_FILES_AS_SOCKETS
to let us use the pipe of death in a poll call.  With this change, dexter
becomes much more portable.  Dexter used to try to set the pipe
non-blocking on it's own, but it only tried one argument to fcntl.  There
are at least four different arguments to fcntl based on what platform you
are on.  APR gets rid of that ugliness for us.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85669 13f79535-47bb-0310-9956-ffa450edef68

ap_select in ap_config.h.  The only file that used ap_select() was
prefork.c.  I have modified prefork.c to use select instead of ap_select.
In the future, this should be modified to use ap_poll like the rest of the
Unix MPMs.  There are other MPMs that are continuing to use select, but this
too should change in time.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85663 13f79535-47bb-0310-9956-ffa450edef68

fix the error checking for one return from ap_poll, and use ap_pcalloc to
allocate the listenfds array.  By using listenfds, we can avoid making
an unnecessary call to ap_create_tcp_socket.
Submitted by:	Jeff Trawick
Reviewed by:	Ryan Bloom


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85661 13f79535-47bb-0310-9956-ffa450edef68

where to change compiled-in limits.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85660 13f79535-47bb-0310-9956-ffa450edef68

redefinition of pollfd.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85659 13f79535-47bb-0310-9956-ffa450edef68

we're using ap_sleep remove the need for sys/socket.h in mpm_common.c


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85658 13f79535-47bb-0310-9956-ffa450edef68

that we would sleep for a specified number of microseconds.  APR provides
a function ap_sleep that does this for us.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85657 13f79535-47bb-0310-9956-ffa450edef68

get the value from the MPM and thus free the MPM to use any variable
name they like.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85655 13f79535-47bb-0310-9956-ffa450edef68

supposed to (doh!) and fix some things to help with restarts.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85654 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85653 13f79535-47bb-0310-9956-ffa450edef68

one now lacking it is winnt, but that'll need someone form the winnt camp
to sort out.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85652 13f79535-47bb-0310-9956-ffa450edef68

Submitted by:	Victor J. Orlikowski <vjo@raleigh.ibm.com>
Reviewed by:	Ryan Bloom


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85651 13f79535-47bb-0310-9956-ffa450edef68

Submitted by:	Victor J. Orlikowski <vjo@raleigh.ibm.com>
Reviewed by:	Ryan Bloom


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85650 13f79535-47bb-0310-9956-ffa450edef68

getting a lot of warnings on platforms that use macros for these functions.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85646 13f79535-47bb-0310-9956-ffa450edef68

compiled-in limits (e.g., ThreadsPerChild, MaxClients, StartTreads).

missing: the same minor changes for the 2nd BeOS MPM

Submitted by:	Greg Ames
Reviewed by:	Jeff Trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85645 13f79535-47bb-0310-9956-ffa450edef68

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blocking (previously, both handles were non-blocking).

ap_set_pipe_timeout() is now the only way to manipulate the
blocking state of the pipe.  Pass -1 for timeout to make it
blocking; pass 0 for timeout to make it non-blocking.

ap_block_pipe() is gone.

A few minor bugs were fixed along the way.

OS-specific notes:

non-Unix in general:

Only Unix/BeOS currently has the optimization to keep track of the blocking
state.  This is used to avoid syscalls as well as to handle ap_put_os_file(),
which is a case where we don't know the blocking state of the handle we are
given.

OS/2:

ap_set_pipe_timeout() with timeout value > 0: The code didn't play with
the blocking state before and it doesn't still.  I did add logic for special
timeout values 0 and -1 to play with the blocking state.

ap_create_pipe():  old logic didn't do anything with the blocking state
of the second handle; it still doesn't; hopefully it is blocking

pre-BONE BEOS:

old code to make a pipe non-blocking was a no-op; now it returns
APR_ENOTIMPL

BONE: old code to make a pipe non-blocking; it passed &zero as the
parm to FIONBIO instead of &one; this bug was fixed

Win32:

The pipe was always created blocking before; no change

previously, ap_setprocattr_io() ignored the blocking flag; now it
respects it like other platforms and calls ap_set_pipe_timeout(p,0)
on appropriate pipe handles (Bill Stoddard was just working in
ap_set_pipe_timeout(), so I presume this is golden)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85637 13f79535-47bb-0310-9956-ffa450edef68

    Correct the problem where the only local host name that the IP stack
    can discover are 'undotted' private names.  If no fully qualified
    domain name can be identified, the default ServerName will be set to
    the machine's IP address string.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85636 13f79535-47bb-0310-9956-ffa450edef68

This also modifies the ap_detach function to look like unixd_detach.
Finally all calls to unixd_detach are changed to ap_detach.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85635 13f79535-47bb-0310-9956-ffa450edef68

Submitted by:Victor J. Orlikowski <vjo@raleigh.ibm.com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85634 13f79535-47bb-0310-9956-ffa450edef68

Submitted by:	Hubert Feyrer <feyrer@rfhs8012.fh-regensburg.de>
Reviewed by:	Ryan Bloom


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85633 13f79535-47bb-0310-9956-ffa450edef68

people test later this week.


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Unfortunately, the resulting warnings are *not* all cleaned up.  Ten or
so warnings spill over to non-AP_DEBUG builds (but that just means that
there is a bigger pool of folks to resolve them, right?).


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85627 13f79535-47bb-0310-9956-ffa450edef68