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mod_disk_cache: don't store hop-by-hop headers on-disk.

Submitted by:	Justin Erenkrantz
Reviewed by:	Cliff Woolley, Jeff Trawick


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thing and asked me to propose the backport.  :-)


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than the data file.  (We rename the tempfile when we're completed with the data
file which is an atomic operation.)

Part of the code assumed that it was using a temporary file; other parts
wrote directly to the body file - which was incorrect.  So, clean up the
whole mess to be consistent and more correct.


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PR 24801

submitted by: [Jess Holle <jessh ptc.com>]
reviewed by: minfrin, bnicholes, clar


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  All that I know of, feel free to add your 2.0.52 binaries notation.

  It sort of seems silly to even track this here, anyone who feels
  like ripping out the 'binaries available' has my blessing.


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years ago. Hope it doesn't break anything :).


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  Otherwise, mod_cache has no clue that the response has a limited lifetime.


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  No functional changes.


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Previously, if the cached copy was stale, the response would go into an
indeterminate state.  Therefore, the freshness check must be done before we
'accept' the response and, if it fails (i.e.  stale), we can't allow any side
effects.

This caused a number of changes to how mod_disk_cache reads its headers as
ap_scan_script_header_err() purposely has side-effects and that's
unacceptable.  So, factor out only what we need.

Also, remove the broken conditional filter code as you can't reliably alter the
 filter list once the response is started.  (Regardless, cache_select_url()
has the freshness checks now.)

Assist to Sascha Schumann for reporting mod_cache was busted.

This commit also includes the following fix to cache_storage:
Tell mod_mem_cache that we will no longer be serving this object if it is
stale


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* server/protocol.c (ap_rgetline_core): Never NUL terminate at
(*s)[-1] for caller-supplied *s.

Submitted by: Rici Lake <ricilake speedy.com.pe>
Reviewed by: jorton, jerenkrantz, trawick


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  Onto 2.0.53 (or sneaking back into 2.0.52?  time will tell.)


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  Bump for tentative 2.0.52 release - tag is APACHE_2_0_52_WROWE_RC1


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PR:
Obtained from:
Submitted by:	nd
Reviewed by:	nd, jorton, trawick, jerenkrantz


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due to disabled/empty caches.
PR:
Obtained from:
Submitted by:	Jess Holle
Reviewed by:	minfrin, bnicholes, trawick


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 (Technically, it invalidates FirstBill's vote; but I'll let it slide...)

Also propose the mod_disk_cache race condition fix.


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PR:
Obtained from:
Submitted by:	Jess Holle
Reviewed by:	minfrin, bnicholes, trawick


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a flood of trouble reports in my inbox should count as a regression!  I win!


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