Keep QUEUE_APPEND()+pollset_add() or QUEUE_REMOVE()+pollset_remove() atomic.

Otherwise when a worker adds an entry in some queue (e.g. KA, lingering), it
might race with the listener in the time between the mutex is released and the
pollset is updated; meanwhile the listener might process the queue and find an
entry no yet in its pollset.

For the lingering queue, the entry could then have been used after its pool
destroyed.


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in https://github.com/google/brotli/commit/fe9f9a9

There's a typo in the upstream commit [1] (s/brotlicommon/libbrotlicommon)
that currently produces an unusable libbrotlienc.pc file, but hopefully
this is going to be fixed there.

[1] https://github.com/google/brotli/commit/fe9f9a9#diff-af3b638bc2a3e6c650974192a53c7291R409


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Remove useless tests in order to avoid the duplication of a message.
Be consistent with "FPM" vs "PHP-FPM" usage messages.
Fix style issues.

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Attempt to dig out of well-meaning fixes for generic fcgi backends
that negatively affected some FPM configs.

Adds ProxyFCGIBackendType 


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backwards per rpluem


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Optimize check for empty strings


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When MPM DSOs are enabled, Apache::Test's invocation of `httpd -V` runs
a full configuration test. To pass, ensure that *all* instances of the
configured prefix path in the test configuration are pointing to a real
directory in check/.

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Can lead to unintended/confusing sharing between 
multiple servers started by the same ID.



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  *) mod_http2: streaming of request output now reacts timely to data
     from other streams becoming available. Same for new incoming requests.



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We want to test everything the user builds, regardless of whether it's
enabled when first installed.

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We should not unfold in HTTP headers in any case, "message/http" is inner content.

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By pointing a local apxs script and corresponding config file into the
build tree, we can trick Apache::Test into testing a server that hasn't
actually been installed.

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Remove definition of ASCII_ZERO which is the same as ZERO_ASCII.

Use ZERO_ASCII and CRLF_ASCII in chunk_filter

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Remove definition of ASCII_CRLF which is the same as CRLF_ASCII.

Use ZERO_ASCII and CRLF_ASCII in mod_proxy_http

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So this is safe to use the 'apr_table_setn' variant in order to save a few bytes of memory.

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