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teaching mod_cache's cache_select_url and cache_save_filter how to deal with
this corner case.

* modules/experimental/cache_storage.c
  (cache_select_url): If we have a stale entry, save the handle so that
  cache_save_filter can use it later, and make the request conditional.
* modules/experimental/cache_util.c
  (ap_cache_request_is_conditional): Take in a table rather than request_rec.
* modules/experimental/mod_cache.c
  (cache_out_filter): Fix bogus comment.
  (cache_save_filter): If we have already responded to the client, block all
  data; correctly merge in 'stale' handles that are not really stale; set
  r->status where appropriate; serve cached response if 'fresh'
* modules/experimental/mod_cache.h
  (cache_info): Add a status field.
  (cache_request_rec): Add stale handle field and note we may block responses.
  (ap_cache_request_is_conditional): Update prototype.
* modules/experimental/mod_disk_cache.c
  (store_headers): Use cache_info status instead of r->status.
* modules/experimental/mod_mem_cache.c
  (recall_headers): Properly recall the status field.
  (store_headers): Store the status field via cache_info status.


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PR: 21492
Submitted by:	R�diger Pl�m <r.pluem t-online.de>
Reviewed by:	Justin Erenkrantz


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PR: 30278
Submitted by:	R�diger Pl�m <r.pluem t-online.de>
Reviewed by:	Justin Erenkrantz


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PR:
Obtained from:
Submitted by:
Reviewed by:


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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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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.


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per-method Satisfy feature was added.

PR: 31315
Submitted by: Rici Lake <rici ricilake.net>


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to disabled/empty caches.
PR:
Obtained from:
Submitted by:	Jess Holle <jessh ptc.com>
Reviewed by:


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PR:
Obtained from:
Submitted by:	Jess Holle <jessh ptc.com>
Reviewed by:


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Previously this would segfault or simply not match as expected,
depending on the platform.


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slow to exit.


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updated mod_info docs.


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Added ?config option. Added printout of config filename and line numbers.

PR: 30919
Submitted by: Rici Lake <rici ricilake.net>


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AllowEncodedSlashes path

thanks to FirstBill for pointing that out!


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PR:
Obtained from:
Submitted by:
Reviewed by:


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- Fix type error in proxy-sendchunks case that caused an invalid T-E header.
- Fix data corruption (seen with mod_ssl/mod_proxy combination) due to not
  properly setting aside the body_buckets.
- Pass along a C-L: 0 if we still have a C-L of 0 after filtering and the
  original request to us had that as well.


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is enabled.  Previously, such urls would still be rejected with
404.


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PR: 14518
Submitted by: michael teitler <michael.teitler cetelem.fr>,
    Jan Kratochvil <rcpt-dev.AT.httpd.apache.org jankratochvil.net>


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Submitted by: Jan Kratochvil <rcpt-dev.AT.httpd.apache.org jankratochvil.net>


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Give Brian and Justin credit for code backported into 2.0. Is this really the only CHANGES entry in 2.1 for cache?


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