update after mod_http2 backport



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mod_http2: fail requests without ERROR log in case we need to read interim
     responses and see only garbage. This can happen if proxied servers send
     data where none should be, e.g. a body for a HEAD request.



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(Why wasn't mod_ssl.html.en updated during my last build...?)

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Remove the bogus "none" and "n/a" type <override>s from the
documentation. If a directive can't be put in .htaccess, it shouldn't
have an <override> element.

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Based on feedback by elukey.

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This page pulls in directives that declare an <override> element and
groups them by class. The documentation for each class comes from
overrides.xml. Any undocumented classes are flagged with a boilerplate
fallback text (this situation is only likely to occur with a misspelling
or otherwise invalid <override> somewhere else in the documentation).

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mod_proxy_http2: update after backport



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1793533 13f79535-47bb-0310-9956-ffa450edef68

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



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1792212 13f79535-47bb-0310-9956-ffa450edef68

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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