(Propose another mod_cache-related backport)


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approved patches later on today :)


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I'm looking at the varios cache patches today and
will likely vote them later on.


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* Remove all filters that are before the cache_out filter. This ensures
  that we kick off the filter stack with our cache_out filter being the
  first in the chain. This make sense because we want to restore things
  in the same manner as we saved them.
  There may be filters before our cache_out filter, because

  1. We call ap_set_content_type during cache_select. This causes
     Content-Type specific filters to be added.
  2. We call the insert_filter hook. This causes filters e.g. like
     the ones set with SetOutputFilter to be added.

PR: 40090

Submitted by: rpluem
Reviewed by: rpluem, wrowe, jerenkrantz


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and various prerequisite patches


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  So remove it.


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* Add extern "C" linkage to several headers to make it easier to use
  them in C++ code.

PR: 42286
Submitted by: Davi Arnaut <davi haxent.com.br>
Reviewed by: rpluem, wrowe, niq


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Merge r473278 from trunk:

Add alternate is_socket_connected by using APR functions.
Submitted by: mturk
Reviewed by: jim


Merge r535354 from trunk:

Abstract out (kinda) MSG_PEEK. This way when we
actually update APR and apr_socket_recvfrom()
to know about APR_MSG_OOB, APR_MSG_PEEK, etc...
this code won't need to be adjusted. Also,
make nicer for 2.2 backport.


Reviewed by: jim


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* Use the query string stored in r->parsed_uri.query instead of r->args
  as r->args could have been changed (e.g. via mod_rewrite) after the quick
  handler hook. This causes resources to be stored under a key, where they
  cannot be fetched again in the quick handler.

PR: 40805

Submitted by: rpluem
Reviewed by: rpluem, jim, sctemme


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