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w/ HTTPProtocolOptions Unsafe


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I tried to add a summary of Stefan's last patches just backported to
2.4.x today. I've read all of them and tried to report Stefan's comment
from PR 53555 as much as possible. Please review and let me know if I wrong
something incorrect or not precise enough.



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Brotli repository.

With the recent update (https://github.com/google/brotli/pull/464), the
official repository now produces pkg-config metadata files (brotli.pc),
and has a fixed library layout (libbrotlicommon/libbrotlienc/libbrotlidec)
on both Windows and Linux.  Expect this layout in the makefiles, and take
advantage of the pkg-config metadata, if it's available.


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the data received from Brotli to create a bucket.

This fixes a /W4 warning in my environment, and should also allow building
mod_brotli on NetWare.

Submitted by: NormW <normw gknw.net>


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Explicitly handle different cases when we do a pkg-config lookup
(<nothing>, --with-brotli or --with-brotli=yes) or examine the path
provided by the user (--with-brotli=PATH).

This lays the groundwork to simplify the switch to the official Brotli
library (https://github.com/google/brotli), instead of expecting the
install layout of a third-party wrapper (https://github.com/bagder/libbrotli).


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mod_proxy_http2: not forwarding any 1xx responses on frontend HTTP/1.x connections. Unless its 100 and the client is expecting that.



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line, but in the strict mode prioritize excessive space testing over bad
space testing (which is captured later) and make both more efficient
(at this test ll[0] is already a SP or NULL char). Also correct a comment. 



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NWGNUsocachmem needs to find mod_status.h


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https://tools.ietf.org/html/rfc7231#section-7.1.2

   The "Location" header field is used in some responses to refer to a
   specific resource in relation to the response.  The type of
   relationship is defined by the combination of request method and
   status code semantics.

     Location = URI-reference

   The field value consists of a single URI-reference.  When it has the
   form of a relative reference ([RFC3986], Section 4.2), the final
   value is computed by resolving it against the effective request URI
   ([RFC3986], Section 5).


There is even an example with no scheme:

     Location: /People.html#tim



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This has changed a bit after the fix for PR 53555. Better wording is welcome.



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from jim


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Allow to use all slots up to ServerLimit. This makes 'scoreboard full'
errors much less likely.

And if ther is a situation where the scoreboard is full, don't make any
more processes finish gracefully due to reduced load until some old
processes have terminated. Otherwise, the situation would get worse once
the load increases again.

ap_daemon_limit is renamed to the more descriptive active_server_limit,
to make sure that all its uses are taken care of.

PR 53555



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The behavior for terminate == 1 was documented but not implemented. Do
that now.




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