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Merge r384580, r390210 and r390619 from trunk, changing the flushing band-aid in mod_proxy_ajp to be configurable.


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PR: 38403


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    * mod_isapi: Trivial compiler emit fixes for const'ness - noticed on OS/X
      Correct lvalue assignments (lvalue casts not allowed) - noticed on Sol.
      Resolve use of SetLastError with apr_set_os_error() and axe MAKEFILE
      for a literal value.  Permits mod_isapi to load and run on Unix.


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Move my -0 to a +1 for this patch, after going back and reading more of the email about it.  It isn't pretty, but there just isn't a better way for now.


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Better explain what this patch is about. It refers
to:

  *) Correctly initialize mod_proxy workers, which use a
     combination of local and shared datasets. Adjust logging
     to better trace usage. PR 38403.

The current impl is broken...


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  not just the comment.


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Merge r377053, r377057 and r377525 from trunk, fixing several issues with mod_proxy_http and keep-alive headers.


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  APR_FILEPATH_NOTABOVEROOT was undefined with a left-hand NULL
  or empty path.  The SECUREROOTPATH and NOTABSOLUTE tests were
  sufficient for this application.  Adjusts for a bug in earlier
  versions of APR with this undefined value.


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I am not comfortable with this solution for making the flushing band aid configurable. I do not oppose the concept, just the placement of the configuration information inside of the mod_proxy core, and not in mod_proxy_ajp.


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Merge r389697 and r390499 from trunk, making mod_disk_cache return better error codes, instead of a silly APR_EGENERAL.


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  With all of the, uhm, interesting manners in which httpd
  can be built and installed, let's ensure httpd -V gives the
  reporter a chance to identify the APR flavor used to compile
  and to run httpd when reporting bugs.


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If a connection aborts while waiting for a chunked line, flag the connection as
errored out and send errors upwards.


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  Low hanging fruit, so low you'll trip over it.


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Fix a race condition when creating the connection pool mutex and make sure that memory is being allocated from the correct pools when connections are being established. Enforce the GLOBAL_ONLY parameter for all of the directives.

Reviewed by: bnicholes, trawick, jim

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* Insert the HTTP_IN filter uncondionally before we call
  ap_send_error_response or ap_die. This ensures that
  ap_discard_request_body called by ap_die and by ap_send_error_response works
  correctly on status codes that do not cause the connection to be dropped and
  in situations where the connection should be kept alive.

PR: 38123
Reviewed by: rpluem, niq, jerenkrantz


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     [Will Rowe, Joe Orton]



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  *) mod_proxy: Fix KeepAlives not being allowed and set to
     backend servers. PR38602. [Ruediger Pluem, Jim Jagielski]

Also, document previous patch:
  *) Correctly initialize mod_proxy workers, which use a
     combination of local and shared datasets. Adjust logging
     to better trace usage. PR38403. [Jim Jagielski]


Reviewed by: jim


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