mod_proxy/ssl: cleanup per-request SSL configuration for recycled proxy conns.

The SSL dir config of proxy/backend connections is stored in r->per_dir_config
but those connections have a lifetime independent of the requests they handle.

So we need to allow the external ssl_engine_set() function to reset mod_ssl's
dir config in between proxy requests, or the first sslconn->dc could be used
after free for the next requests.

mod_proxy can then reset/reinit the request config when recycling its backend
connections.

* Solve a chicken and egg problem here:
  We need to have sslconn->dc set correctly when we want to
  init sslconn, but we need to allocate memory for it first.

PR 63256.
Submitted by: ylavic, rpluem
Reviewed by: ylavic, jorton, jim


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* modules/ssl/ssl_engine_kernel.c (ssl_hook_Access_modern): Correctly
  restore SSL verify state after PHA failure in TLSv1.3.

Submitted by: Michael Kaufmann <mail michael-kaufmann.ch>
Reviewed by: jorton, covener, jim


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  *) maintainer mode fix for util.c no2slash_ex
     trunk patch: http://svn.apache.org/r1855755
     2.4.x patch svn merge -c 1855755 ^/httpd/httpd/trunk .
     +1: covener, rpluem, jim, ylavic




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vote


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Support %{c}h for conn-hostname, %h for useragent_host
Submitted by: wrowe
Reviewed by: jim, ylavic, covener
Merge r1818321 from trunk:

"{c}h" exists and logs the value returned by 'ap_get_useragent_host()'.

I'm not sure of the description to write there, so I just mention it in the doc and hope s.o. will find the words :)

This has been introduced in r1730129.
Submitted by: jailletc36
Reviewed by: jim, ylavic, covener


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Merge r1768070, r1768120, r1768225, r1769712, r1769737, r1774610, r1828624, r1828626, r1855701 from trunk:

And the socache provider interface for Redis


And provide some nice usage stats. Could be prettier, for sure.

Needs LOGNO #s

reorganize mod_socache_redis so it compiles w/o apr-redis

It looks like this was the original intent. The provider
is not registered if apr-redis is missing.

It was previously failing to compile due to the dirconf being
hidden behind the #ifdef guard but not the routine module
code that used it.




Fix some HTML tags
</br> --> <br />

Couls also be <br> or <br/> but some (very) old clients don't like it.
httpd is not really consistent on it. (personnlaly <br> would be just fine for me but <br /> is the most commonly used form)

related to http://svn.apache.org/viewvc?view=revision&revision=1774602


Use apr_pcalloc in the 'create' function. All the fields are initialized in the 'init' function, but it is It is cleaner and more future proof.

Small style correction (remove extra spaces)

Initial doc for the sosache_redis module.

Corrections and improvements welcome.

Update compatibility notes for mod_socache_redis
Submitted by: jim, covener, jailletc36, jim, jailletc36, jailletc36, jailletc36
Reviewed by: jim, minfrin, covener


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r->parsed_uri.path safety in recent backport

*) core: fix SEGFAULT in CONNECT with recent change
   2.4.x: svn merge -c 1855743,1855744 ^/httpd/httpd/trunk .
   +1: rpluem, icing, covener




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r->parsed_uri.path safety in recent backport



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core: merge consecutive slashes in the path



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When r1729208 has been backported in 2.4.x (see r1743576), a coment has been missed in the backport proposal and has never reached 2.4.x.

Add it now, in order to synch a bit the 2 branches.

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Merge of 1849296,1852038,1852101,1852339,1853171,1853967,1854365,1854963,1854964,1855295,1855411 from trunk:

  *) mod_http2: when SSL renegotiation is inhibited and a 403 ErrorDocument is
     in play, the proper HTTP/2 stream reset did not trigger with H2_ERR_HTTP_1_1_REQUIRED.
     Fixed. [Michael Kaufmann] 

  *) mod_http2: new configuration directive: `H2Padding numbits` to control 
     padding of HTTP/2 payload frames. 'numbits' is a number from 0-8,
     controlling the range of padding bytes added to a frame. The actual number
     added is chosen randomly per frame. This applies to HEADERS, DATA and PUSH_PROMISE
     frames equally. The default continues to be 0, e.g. no padding. [Stefan Eissing] 
  
  *) mod_http2: ripping out all the h2_req_engine internal features now that mod_proxy_http2
     has no more need for it. Optional functions are still declared but no longer implemented.
     While previous mod_proxy_http2 will work with this, it is recommeneded to run the matching
     versions of both modules. [Stefan Eissing]
  
  *) mod_proxy_http2: changed mod_proxy_http2 implementation and fixed several bugs which
     resolve PR63170. The proxy module does now a single h2 request on the (reused)
     connection and returns. [Stefan Eissing]
  
  *) mod_http2/mod_proxy_http2: proxy_http2 checks correct master connection aborted status 
     to trigger immediate shutdown of backend connections. This is now always signalled
     by mod_http2 when the the session is being released. 
     proxy_http2 now only sends a PING frame to the backend when there is not already one
     in flight. [Stefan Eissing]

  *) mod_proxy_http2: fixed an issue where a proxy_http2 handler entered an infinite 
     loop when encountering certain errors on the backend connection. 
     See <https://bz.apache.org/bugzilla/show_bug.cgi?id=63170>. [Stefan Eissing]

  *) mod_http2: Configuration directives H2Push and H2Upgrade can now be specified per 
     Location/Directory, e.g. disabling PUSH for a specific set of resources. [Stefan Eissing]

  *) mod_http2: HEAD requests to some module such as mod_cgid caused the stream to
     terminate improperly and cause a HTTP/2 PROTOCOL_ERROR. 
     Fixes <https://github.com/icing/mod_h2/issues/167>. [Michael Kaufmann]




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