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Remove declaration for dropped ap_has_cntrl().


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Sorry for the noise.


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- ap_scan_http_uri_safe() was removed
- ap_scan_vchar_obstext() was introduced


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Dropped the never-released ap_has_cntrls() as it had very limited 
and inefficient application at that, added ap_scan_vchar_obstext()
to accomplish a similar purpose.

Dropped HttpProtocolOptions StrictURL option, this will be better
handled in the future with a specific directive and perhaps multiple
levels of scrutiny, use ap_scan_vchar_obstext() to simply ensure there
are no control characters or whitespace within the URI.

Changed the scanning of the response header table by check_headers()
to follow the same rulesets as reading request headers. Disallow any
CTL character within a response header value, and any CTL or whitespace
in response header field name, even in strict mode.

Apply HttpProtocolOptions Strict to chunk header parsing, invalid
whitespace is invalid, line termination must follow CRLF convention.



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dav_hooks_vsn.deliver_report() and dav_hooks_vsn.merge() hook
definitions.

* modules/dav/main/mod_dav.h
  (dav_hooks_repository.deliver, dav_hooks_vsn.deliver_report,
   dav_hooks_vsn.merge): Add notes about the API issue.


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behavior in a routine that sends <DAV:response>'s to the output filters.

The dav_send_one_response() function accepts the current head of the output
filter list as an argument, but the actual head can change between calls to
ap_pass_brigade().  This can happen with self-removing filters, e.g., with
the filter from mod_headers or mod_deflate.  Consequently, executing an
already removed filter can either cause unwanted memory usage or incorrect
behavior.

This patch changes the signature of the existing mod_dav's public API,
dav_send_one_response(), because this API is not yet a part of any 2.4.x
release.

* modules/dav/main/mod_dav.c
  (dav_send_one_response): Accept a request_rec instead of an ap_filter_t.
   Write the response to r->output_filters.
  (dav_send_multistatus, dav_stream_response): Update these calling sites
   of dav_send_one_response().

* modules/dav/main/mod_dav.h
  (dav_send_one_response): Adjust definition.


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per http://httpd.apache.org/docs/2.4/mod/core.html#comment_5866

kernel.org links here.



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We still need to kill kept-alive connections in normal/expiry processing if
the workers are busy or dying.



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apr_pollset_wakeup(), when implemented, to signal the listener according to the
next timers or timeout queues expiry (updated at insert and maintenance time).



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We don't need external locking since it's created with APR_POLLSET_THREADSAFE,
hence reduce those sections to the lowest cycles possible.

A spinlock may be interesting instead of the mutex now, we won't block and the
TO_QUEUE_*() and process_timeout_queue() operations are fast...



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and move TO_QUEUE_*() macros to functions.


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Set timestamp before enqueing the timer on resume.


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To help out users when debugging ProxyPass and ProxyPassMatch, log all
match attempts (at trace2), as well as matches that are either
successful or explicitly disabled (at trace1).

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disables Brotli compression for a particular request.

This mimicks how mod_deflate handles the 'no-gzip' env variable, and
should allow seamless migration for configurations that use it.


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directive.


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