Merge r1776575, r1776578, r1776624, r1776627, r1776674, r1776734, r1776740, r1778268, r1780725, r1781030, r1781031, r1781701, r1788674, r1789800, r1790169, r1790457, r1790691, r1806985, r1812332, r1818279 from trunk:

Merge new PROXY protocol code into mod_remoteip

Fix typo in mod_remoteip's doc

Shorten RemoteIPProxyProtocolEnable to RemoteIPProxyProtocol and correct references in docs

Move attribution for mod_remoteip RemoteIPProxyProtocol from file to CHANGES

On the trunk:

* mod_remoteip: added cast to fix clang compiler error



Reinsert attribution to mod_remoteip.c for PROXY protocol

* Silence compiler warning

Set all read buckets aside in case we need to restore all during optional header processing

* modules/metadata/mod_remoteip.c: Fix GCC strict-aliasing warning
  by moving deference of header array via a different pointer type 
  ("type-punning") out of line.


* modules/metadata/mod_remoteip.c (register_hooks,
  remoteip_hook_pre_connection): Reference the filter by handle rather
  than name (avoiding tree lookup by name on use).


Change tactic for PROXY processing in Optional case

Finally include feedback from Ruediger Pluem. Add slave "backoff" verified by Sander Hoentjen

Update PROXY handling by removing Optional processing

Rename RemoteIPProxyProtocolDisableHosts to RemoteIPProxyProtocolExceptions

Fix directive name in 
(s/RemoteIPProxyProtocolDisableNetworks/RemoteIPProxyProtocolExceptions/)

Use cmd->cmd->name instead to be future proof.

XML update plus typo in mod_remoteip.xml.


PROXY protocol proposal corrections

Fix format pattern (%lu => %APR_SIZE_T_FMT).

Detected by maintainer mode compilation and GCC error:

.../modules/metadata/mod_remoteip.c:
In function 'remoteip_input_filter':
.../include/http_log.h:117:33:
error: format '%lu' expects argument of type
'long unsigned int', but argument 8 has type
'apr_size_t {aka unsigned int}' [-Werror=format=]


APR-ize uint types


Submitted by: druggeri, elukey, druggeri, druggeri, druggeri, icing, druggeri, rpluem, druggeri, jorton, jorton, druggeri, druggeri, druggeri, druggeri, jailletc36, lgentis, mrumph, rjung, jim
Reviewed by: druggeri, jim, minfrin


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Fix segfault with logresolve -c and IPv6

Due to a logic error, there could be a NULL pointer dereference.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=823259


Fix comment typo

Submitted by: sf
Reviewed by: jailletc36, minfrin, jim


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trunk patch: http://svn.apache.org/r1776575
             http://svn.apache.org/r1776578 (doc fix)
             http://svn.apache.org/r1776624
             http://svn.apache.org/r1776627 (shortened name + doc fix)
             http://svn.apache.org/r1776674 (attribution moved to CHANGES)
             http://svn.apache.org/r1776734
             http://svn.apache.org/r1776740 (attribution updated in mod_remotip.c)
             http://svn.apache.org/r1778268 (fix compiler warning)
             http://svn.apache.org/r1780725 (set buckets aside)
             http://svn.apache.org/r1781030 (fix strict GCC warning)
             http://svn.apache.org/r1781031 (reference the filter by handle)
             http://svn.apache.org/r1781701 (rework optional processing case)
             http://svn.apache.org/r1788674 (final edge cases/ignore slave conns)
             http://svn.apache.org/r1789800 (remove optional processing)
             http://svn.apache.org/r1790169 (rename "exception" directive)
             http://svn.apache.org/r1790457 (Update directive name in err message)
             http://svn.apache.org/r1790691
             http://svn.apache.org/r1806985
             http://svn.apache.org/r1818279
2.4 convenience patch (includes CHANGES):
             http://home.apache.org/~ylavic/patches/RemoteIPProxyProtocol.2.4-v3.patch
+1: druggeri, jim, minfrin


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allowing per backend TLS configuration.
trunk patch: http://svn.apache.org/r1740928
             http://svn.apache.org/r1740960
             http://svn.apache.org/r1740967
             http://svn.apache.org/r1740987
             http://svn.apache.org/r1740998
             http://svn.apache.org/r1742697
             http://svn.apache.org/r1756976
             http://svn.apache.org/r1781313
             http://svn.apache.org/r1812193
2.4.x patch: https://svn.apache.org/repos/asf/httpd/httpd/patches/2.4.x/httpd-2.4.x-r1740928_and_co-v6.patch
+1: ylavic, icing, minfrin


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trunk patch: http://svn.apache.org/r1810358
             http://svn.apache.org/r1810362
             http://svn.apache.org/r1810363
             http://svn.apache.org/r1810365
             http://svn.apache.org/r1810447
             http://svn.apache.org/r1816919
             http://svn.apache.org/r1816922
             http://svn.apache.org/r1818013
             http://svn.apache.org/r1818280
+1: jim, icing, minfrin
icing: tested on ubuntu 16.04 with a simple uwsgi python app.


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depend on the number of restarts (non-Unix systems) and preserve shared
names as much as possible on configuration changes for SHMs and persisted
files.  PR 62044.
trunk patch: http://svn.apache.org/r1822509
             http://svn.apache.org/r1822511
             http://svn.apache.org/r1823412
             http://svn.apache.org/r1823415
             http://svn.apache.org/r1823416
             http://svn.apache.org/r1823564
             http://svn.apache.org/r1823572
             http://svn.apache.org/r1823575
2.4.x patch: trunk works (modulo CHANGES)
             (or http://home.apache.org/~ylavic/patches/httpd-2.4.x-PR62044-slotmems_reuse.patch)
+1: ylavic, jim, minfrin


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Credit: Hendrik Harms <hendrik.harms@gmail.com>


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Merged /httpd/httpd/trunk:r1821371,1822502-1822503,1822624



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mod_event: Let the listener thread do its maintenance job on resources shortage.

PR 61979.


Follow up to r1821558: CHANGES typo.


mpm_event: Follow up to r1821558.

Don't crash (in listener) if we can't create the ptrans allocator.


Submitted by: ylavic
Reviewed by: ylavic, jim, icing


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mpm_event: wakeup the listener to re-enable listening sockets.

When listening sockets are disabled (too many connections) and the number of
workers / active connections comes back below the limit, we need to wake up
the listener to re-enable them.

Add a new connections_above_limit() helper to determine when this applies.


Follow up to r1819855: CHANGES entry.


Submitted by: ylavic
Reviewed by: ylavic, jim, icing


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