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   * mod_cache, mod_disk_cache: Try to use the key of a possible open but
     stale cache entry if there is one. This fixes problem when two different
     cache locks have been created for single stale cache entry leading to two
     requests sent to backend.
     PR 50317

   * Remove useless apr_file_remove() before renaming the cache entry in
     mod_disk_cache. This fixes small time-frame during which stale cache
     entry can be seen as not-cached.
     PR 50317

Subitted By: rpluem, jkaluza, ylavic
Reviewed By: ylavic, rpluem, jkaluza



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   * mod_rewrite: Support session cookies with the CO= flag when later parameters
     are used.  The doc for this implied the feature had been backported for
     quite some time.  PR56014

Submitted by: covener
Reviewed by: covener, ylavic, rpluem



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     revalidated. This prevents the thundring herd protection from serving
     stale during a revalidation. Reverts most of r572626 which is also gone
     from later branches.   PR 50317.

Submitted By: covener, jkaluza, rpluem
Reviewed By: covener, jkaluza, ylavic


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* server/listen.c (ap_apply_accept_filter): Bump TCP_DEFER_ACCEPT
argument to 30 units-of-unspecified-nature.

Submitted by: Dean Gaudet <dean arctic.org>
Reviewed by: ylavic, trawick, covener



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#comment_2558

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