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mod_proxy_http2: update after backport



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mod_proxy_http2: adding support for Reverse Proxy Request headers.



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Document the implicit behaviour of ListenCoresBucketsRatio when multiple
Listen-ers are configured on the same IP:port.



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It has been reported multiple times that nested
If/ElseIf/Else sections are not evaluated but
silently ignored.

This patch adds a simple recursion to the ap_if_walk
logic in order to allow arbitrary nested configs.
The overhead seems negligible compared to the actual
version of the ap_if_walk, but more expert feedback
is surely needed since this code gets called for every
HTTP request.

Tests are going to be added to t/apache/if_sections.t



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Where Accept-Lanuage is da Q=1 and ru Q=1, leaving these out of the priority
list results in English as the tie-breaker, which is incorrect.



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mod_http2: update after backport



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mod_http2: fixed possible deadlock that could occur when connections were 
     terminated early with ongoing streams. Fixed possible hanger with timeout
     on race when connection considers itself idle.



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That allows to upgrade to jboss-remoting for example
or to run an HTTP/1.1 backend that needs to upgrade to
WebSocket.
See also:
 https://issues.jboss.org/browse/JBCS-254
 https://issues.jboss.org/browse/JBCS-291


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A configtest isn't useful if you're just trying to get compile settings.
Move the settings dump up to just after ap_read_config(), which has
already done the minimum necessary to figure out which MPM is in use.

Even if ap_read_config() failed, still print as many compile settings as
we can. The user will see the error log entry on stderr.

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Start from 10027 to match the current trunk (r1791845), which will be
merged into shortly.

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This should help during testing and debugging. Use APLOG_NOTICE for now,
until we fix PR60999, so that people can actually see the log message.

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This is most likely a follow-up to r1628833.

At some point during the OpenSSL 1.0.2 beta, the contract for custom
extension callbacks changed from "returning -1 skips the extension" to
"returning -1 will issue a TLS fatal alert". This caused mod_ssl_ct to
abort TLS connections that it intended to ignore. Zero is the correct
return value for "do nothing" in 1.0.2.

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LanguagePriority by a first-order comparison and drop negligable translations
from our ordered priority preference list entirely.

A better comparison would be total number of documents in-sync, or some
convoluted weight ordering each document by which are more in sync than
others. Leaving that puzzle to an interested hacker.


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update after mod_http2 backport.



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mod_http2: normalize zombie slot state before pushing it on the free list.



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...but at the moment, this won't actually get logged unless you're
running in debug mode, due to an unrelated bug (PR60999).

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CRYPTO_THREADID_set_callback() is write-once, so if mod_ssl is unloaded
and reloaded into a different address, we'll crash if OpenSSL wasn't
also unloaded and reloaded at the same time. This can happen if another
module or library is using OpenSSL as well.

- OpenSSL 1.1.0 isn't affected.
- Certain platforms (Windows, BeOS, and POSIX-compliant systems) can
  make use of the default THREADID callback in OpenSSL 1.0.x.
- If the deprecated CRYPTO_set_id_callback() is available, we can use it
  instead of CRYPTO_THREADID_set_callback().

Otherwise, we have to fall back to CRYPTO_THREADID_set_callback(), but
hopefully that applies to a small percentage of users at this point.

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Mark the things that are busted.

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