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* Fix ap_unescape_url_keep2f to work as documented (keep %2F encoded,
  bringing it into line with the documentation as well as common sense).
* Introduce suggestion of an extension to the API
The most relevant open PR is 41798


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that this was not happening).  Note Makefile.win always moves zlib1.dll
for this very purpose.

Also fix some versioning file and resource names of filter/ext_filter
that were messed up when it was cloned.

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A tilde can sneak into a rule via a backreference and cause some surprising behavior



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Note that this changes a patch proposed for backport to 2.2 (PR34602 & r573831).


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make them as such :)


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PR: 39613


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PR: 43386


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  1. Rename worker_size, since this could easily be
     confused with the actual MPM worker struct stuff.
  2. Remove superflous ()s in the || test
  3. Add superflous () in the pointer adjusting :)
     Even though C prec rules make it clear what we
     are doing, make it painfully obvious. Remove
     unrequired temp var.


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while using request-lifespan copies for manipulation.

Reviewed by RPleum, ZHar'El



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  of HTTP headers used in a rewrite condition to the Vary header of
  the response.


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  structure for a worker is already initialized by the same or another
  process.


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PR: 42031


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Run optipng[1] with -o7 over all PNG files.  Files were only modified if the optimized version is smaller.  There is no change to the rendering as seen by users.

[1] - http://optipng.sourceforge.net/


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energy to care about this anymore.


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PR 38014 [Basant Kumar Kukreja]



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  header, but all remaining rewrite conditions are skipped due to the [OR]
  flag.


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PR 40733 [Ulf Harnhammar]



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into the Proxy API. 


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PR 25947
RFC2616 tells us:
  (1) If we haven't authenticated, we must pass the header on.
  (2) If we have authenticated, we MAY pass it on.
I've made the latter case configurable by ENV(Proxy-Chain-Auth).

Also, Proxy-Authenticate is a response header, and doesn't belong
in a check of request headers.


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PR 40952


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