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Merged /httpd/httpd/trunk:r1811649,1811664,1814118

  *) ab: Make the TLS layer aware that the underlying socket is nonblocking,
     and use/handle POLLOUT where needed to avoid busy IOs and recover write
     errors when appropriate.  [Yann Ylavic]

  *) ab: Keep reading nonblocking to exhaust TCP or SSL buffers when previous
     read was incomplete (the SSL case can cause the next poll() to timeout
     since data are buffered already).  PR 61301 [Luca Toscano, Yann Ylavic]




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Merge of r1813767 from trunk.

mod_http2: avoid unnecessary data retrieval for a trace log. Allow certain
     information retrievals on null bucket beams where it makes sense.



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   - add some links and color highligh
   - remove some <var> (i.e. italic) around parameters that should be written unmodified (On|Off...)

r1813997 in trunk + some small modifications to synch with trunk

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+-   if ((forbidden & NOT_IN_DIR_CONTEXT) == NOT_IN_DIR_CONTEXT) {
++   if ((forbidden & NOT_IN_DIR_LOC_FILE) == NOT_IN_DIR_LOC_FILE) {
+        if (cmd->path != NULL) {
+            return apr_pstrcat(cmd->pool, cmd->cmd->name, gt,
+-                           " cannot occur within directory context", NULL);
++                           " cannot occur within <Directory/Location/Files/Proxy> "
++                           "section", NULL);
+        }
+        ...
+    }



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Fix maintainer mode with GCC/Clang.

Setting -Wstrict-prototypes in combination
with -Werror leads to compiler errors during
configure checks (autoconf generates incomplete
prototypes).

Adding -Wno-error=strict-prototypes lets the
compiler tolerate those.

Possible future enhancement: remember such
"configure time only" flags and remove them
from CFLAGS before generating our build time
files (Makefile, config_vars.mk etc.), so that
the full -Werror is in place during building.


Follow up to r1812263.

As suggested by Joe, add --maintainer/debugger-mode's CFLAGS in
NOTEST_CFLAGS to avoid interractions with autoconf's AC_LANG_PROGRAM.

APACHE_ADD_GCC_CFLAG now also forces -Wno-strict-prototypes for -Werror
to work despite AC_LANG_PROGRAM generating this warning by itself.


Submitted by: rjung, ylavic
Reviewed by: ylavic, rjung, jim


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make the current situation clearer.

I hope the new text is OK for Yann, otherwise I
could revert and add as my own comment.

i think r1812339 should be an integral part of
the mod_journald backport and currently we do not
have any obstacle for the configure.in proposal.
The ap_expr fix was already backported, the
mod_remoteip fix does not apply to the 2.4 code
and the mod_journald fix IMHO should be voted and
applied together with the pending mod_journald
backport.


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* The libnghttp2.pc might be found in lib64 on 64 bit systems
Submitted by: rpluem
Reviewed by: rpluem, icing, ylavic


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