Now, dunno if that was intended, but at least allow to start the httpd

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  apu-config which is gone in APR 2.0.


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Translated by: Nilgün Belma Bugüner <nilgun belgeler.org>
Reviewed by:  Orhan Berent <berent belgeler.org>

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- Use brigade_write instead of immortal buckets that aren't immortal.
- Read HTTP status code from serf.
- Remove extra logging.


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Convert the 100ms timed callback to a single cleanup callback that is added
when the request is ready to finish. Basically works, though it has
some issues with flushing and closing the connection.


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completely async from the original thread.

Right now it uses a 100ms timer to determine when the request is actaully complete,
but I think this can be removed in the long run with a better mechanism.


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Event MPM.

Add a new MPM Query to determine if an MPM supports this.


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* modules/proxy/mod_serf.c
    (serf_config_t): Add preservehost member.
    (setup_request): If preservehost is set, use the client provided Host header,
        otherwise use the one from the configuration.
    (is_true): New helper function for decoding true/false strings.
    (add_pass): Change to an argv configuration function, check for not enough
        args, and parse everything after the URI into key/value pairs.
    (create_dir_config): Default to setting preservehost to on.
    (serf_cmds): Change add_pass to a take argv directive.


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    (hb_list_servers): Allows relative paths for the heartbeat file.


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Add Clustered proxying support to mod_serf, by using the heartbeats system.

No preconfiguration of cluster members is needed.

Just a config like this:
    SerfCluster sweet heartbeat file=/var/cache/apache/hb.dat
    SerfCluster sour heartbeat file=/var/cache/apache/cluster2.dat
    <Location "/">
      SerfPass cluster://sweet
    </Location>
    <Location "/different_cluster">
      SerfPass cluster://sour
    </Location>

The location of all possible destination servers is provided by a new 
providers interface, that includes configuration checking of the arguments to 
the SerfCluster command, solving one of the worst problems with the mod_proxy 
load balancer subsystem.


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  (hm_update_stats): Flush heartbeat file before closing, to make sure the file
    is always written correctly, and check for errors on flush or close.


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This is embarassing.


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Yank the few bits that implement the concept of an experimental MPM.


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LynxOS, QNX, and UnixWare


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Note: Prior to the MPM-as-DSO churn, the following MPMs did not enable this logic:

  WinNT       APR supports no-oping the setsockopt() based on inheriting Nagle from the 
              listening socket on this platform, so the new APR call will be a no-op.
  simple      same as WinNT for at least some Unix-y platforms
  BeOS        shrug



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  restore expected accept mutex mechanism and allocator limit support
  (the related AP_MPM_WANT_foo defines no longer exist)


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to allow filenames with globbing characters to be retrieved instead of
presented in a directory listing.

Submitted by: Dan Poirier <poirier pobox.com>
Reviewed by: covener



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