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Fix  incomplete filename in ErrorLog when trying to access files in non existing directories
PR39944
Submitted by: jailletc36
Reviewed/backported by: jim


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Don't keepalive the connection to the client if the
backend closes the connection.

PR: 54474
Submitted by: Pavel Mateja <pavel netsafe cz>

Submitted by: sf
Reviewed/backported by: jim


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and

this backport appears stalled


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fill in the dots for 
http://httpd.apache.org/docs/2.4/platform/windows.html#comment_802



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Improve pkg-config usage for mod_ssl/ab:

also use pkg-config for determining the -l flags (and fall back
to a hardcoded default of "-lssl -lcrypto")

add --static to pkg-config invocations, so that libraries for
static linking are also taken into account (PR 54252 - note that
the additional flags will only appear in modules/ssl/modules.mk
and ab_LDFLAGS, so potential side effects are limited)

separate --libs-only-L and --libs-only-other into two invocations
(can't be used concurrently, only the first takes effect)

use --silence-errors where applicable


mod_ssl/ab: only use "--static" for pkg-config when explicity requested
(by adding an "--enable-ssl-staticlib-deps" option to configure)

Submitted by: kbrand
Reviewed/backported by: jim


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Give the opportunity to the compiler to compute at compile time the strlen of the given
string. Most of the calls to ap_fputs are done with constant strings.
Submitted by: jailletc36
Reviewed/backported by: jim


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Add a few AP_DEBUG_ASSERT()s for the benefit of clang


style tweak

No need to clear memory that is fully initialized just the line after.

Avoid unnecessary %s substitution

Avoid processing some files twice if APR_INCLUDEDIR and
APU_INCLUDEDIR containin the same path but differing in
doubled slashes.


Fixed position of the NEED_ENHANCED_ESCAPES define.

This define should be outside of the else case so that it
gets also defined if we cross-compile for Win32 or OS2.

Submitted by: sf, trawick, jailletc36, jailletc36, sf, fuankg
Reviewed/backported by: jim


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add new ap_bin2hex() utility function


remove unnecessary cast

Submitted by: sf
Reviewed/backported by: jim


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Add useful mod_status info... try to determine last time
a specific vhost was accessed/used.
Reviewed/backported by: jim


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