thread handles in batches.

Starting from r1801636, there is no difference between ending the wait with
one or multiple remaining threads.  This is because we terminate the process
if at least one thread is still active when we hit a timeout.

Therefore, instead of making an effort to evenly distribute and batch the
handles with WaitForMultipleObjects(), we could just start from one end,
and wait for one thread handle at a time.


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hits a timeout while waiting for the worker threads to exit.

Using TerminateThread() can have dangerous consequences such as deadlocks —
say, if the the thread is terminated while holding a lock or a heap lock
in the middle of HeapAlloc(), as these locks would not be released.
Or it can corrupt the application state and cause a crash.

(See https://msdn.microsoft.com/en-us/library/windows/desktop/ms686717)

Rework the code to call TerminateProcess() in the described circumstances
and leave the cleanup to the operating system.


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when shutting down the worker threads.

Previously, the shutdown code was posting an amount of I/O completion
packets equal to the amount of the threads blocked on the I/O completion
port.  Then it would Sleep() until all these threads "acknowledge" the
completion packets by decrementing the global amount of blocked threads.

A better way would be to send the number of IOCP_SHUTDOWN completion
packets equal to the total amount of threads and immediately proceed to
the next step.  There is no need to block until the threads actually receive
the completion, as the shutdown process includes a separate step that waits
until the threads exit, and the new approach avoids an unnecessary delay.


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Add logic to read the Upgrade header and use it in the response.
Use we you are proxying to a server that has multiple upgrade on the same IP/Port.
PR 61142


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values in a couple of missed places in winnt_accept().


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would return a proper apr_status_t instead of yielding the result via the
*timeout out variable.

This makes the calling side easier to follow by avoiding an additional
layer of if's.


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from the mpm_get_completion_context() function.

Currently, the only possible reasons why mpm_get_completion_context() could
fail are real errors such as being unable to WaitForSingleObject(), allocate
memory or create an event.  Retrying under such circumstances doesn't make
sense, and could be as well considered harmful.


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filter and use an appropriate enum for it.

This makes the code in winnt_accept() a bit easier to follow.  As a minor
side effect, it also fixes a small bug where the "unrecognized AcceptFilter
'%s'" log entry would always contain "none" instead of the actually
unrecognized kind of the accept filter.


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cleanup in the child process.


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mod_http2: Simplify ready queue, less memory and better performance. Update
     mod_http2 version to 1.10.7.


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comparisons.

Submitted by: wrowe, Robert Święcki <robert swiecki.net>



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Compilation now tested against Lus 5.1, 5.2
and 5.3. The libs were compiled with COMPAT
flags set, but mod_lua no longer sets them
so it should compile and run with non-COMPAT
libs as well.


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lua from r1785753. This should now no longer
be needed.


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Patch taken from PR58188 which picked it from
openSUSE.

Still needs testing.


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One last use of luaL_register() with a non-NULL
"name" argument remaining.

Not tested yet.


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PR58188, PR60831, PR61245.

Still to solve: replace uses of luaL_register().


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mod_http2: disable and give warning when mpm_prefork is encountered. 
     The server will continue to work, but HTTP/2 will no longer be negotiated.



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  existing passwd file.
  This long standing bug was triggered by fixing a bug in APR in r1791029.

PR: 61240


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Reverts r1780328, r1780329, and their associated followups, which
incorrectly manipulated SCRIPT_NAME by default. All proxy_fcgi.t
regression tests now pass.

PR: 61202

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PR: 61220
Submitted by: ylavic



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Discussion on-list, but any occurance of a platform-specific behavior in this
code path will alter the behavior of the core code and introduce the very
fingerprintable behavior this patch pretended to obscuficate.

Returning 404 for /CON for example may lead to a module such as mod_speling
revealing the existance of a real file named similar to /.conf, which makes
this an unwise behavior.

Further discussion of returning 404 for all CHR files encountered in the
filepath (not URI path), which currently return 403 on all platforms,
belongs on the dev list.





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