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Add logic to read the Upgrade header and use it in the response.
Use we you are proxying to a server that has multiple upgrade on the same IP/Port.
PR 61142

Submitted by: jfclere
Reviewed by: jfclere, jim, covener


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Replaced the old list with what currently found in
https://httpd.apache.org/docs/current/mod/directives.html

This should allow a better highlight of new directives
like the mod_http2's ones



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include the scheme in the error message about missing a 
mod_proxy_submodule (mod_proxy_$usually_a_scheme)


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


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Allow WatchdogInterval to be sub 1 second

Allow finer control over hcheck intervals... minimum is whatever
the watchdog slice is.

Fix remaining lint from ms capability for hchecks.

userland change = we now are OK w/ ms


Submitted by: jim
Reviewed by: jim, covener, ylavic


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mod_http2: version bump, partial fix for stream response getting stuck, see https://github.com/icing/mod_h2/issues/143

mod_http2: signalling produce IO before waiting on beam buffer to drain.

mod_http2: non-dev version for backport

Submitted by: icing
Reviewed/backported by: icing, steffenal, ylavic


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Add an Override Class Index

This page pulls in directives that declare an <override> element and
groups them by class. The documentation for each class comes from
overrides.xml. Any undocumented classes are flagged with a boilerplate
fallback text (this situation is only likely to occur with a misspelling
or otherwise invalid <override> somewhere else in the documentation).

override index: clarify this doc's purpose

Based on feedback by elukey.
Submitted by: jchampion
Reviewed by: jchampion, jim, icing


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Make sure updatelbstatus() is NULL

Submitted by: jim
Reviewed by: jim, covener, ylavic


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buildconf: allow configuration without APR sources

Previously we required copying the APR (and APR-util) source code into
srclib or some other location on disk in order to build httpd directly
from source. This is annoying if you're on a distribution that already
has the required files in its APR dev packages.

Practically speaking, if you're not building an official distribution
tarball, you only need the following files:

1) config.guess
2) config.sub
3) find_apr.m4
4) find_apu.m4
5) PrintPath

1 and 2 come from automake. 3 and 4 are included in some distributions'
(e.g. Debian's) development packages for APR/-util. That leaves
PrintPath, which has not changed meaningfully in over a decade and is
checked in completely here.

Passing an apr-config executable to buildconf's --with-apr option will
now enable a mode in which the above files (minus PrintPath) are copied
from their respective homes, removing the need for APR sources on disk.
Otherwise, if a source tree is passed, the current behavior is retained
and all of the above files are copied from APR directly.

buildconf: add --help for the new behavior

buildconf's behavior is a little complicated (and was made more so with
apr-config mode), so add some self-documentation.

buildconf: check in APR[-util] m4 macros

Suggestion by wrowe. These files haven't changed in years; since we need
them anyway, check them in directly. buildconf will still copy over the
latest versions during setup, and SVN will tell us if there are any
changes.

Submitted by: jchampion
Reviewed by: jchampion, jim, ylavic


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core: Disallow Methods' registration at run time (.htaccess), they may be
used only if registered at init time (httpd.conf).

Calling ap_method_register() in children processes is not the right scope
since it won't be shared for all requests.

Reviewed by: ylavic, covener, icing


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Follow up to r1739201.
These APR_TIMEUP special cases are now handled by ap_map_http_request_error().

Reviewed by: jailletc36, jim, covener


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mod_ssl: we can't use SSL_COMP_free_compression_methods() if OPENSSL_NO_COMP
is defined.  PR 61206.

Submitted by: Michael Schlenker <msc contact.de>


mod_ssl, ab: compatibility with LibreSSL.  PR 61184.

LibreSSL defines OPENSSL_VERSION_NUMBER = 2.0, but is not compatible with
all of the latest OpenSSL 1.1 API.

Address this by defining MODSSL_USE_OPENSSL_PRE_1_1_API which is true for
anything but OpenSSL >= 1.1 (for now).

Proposed by: Bernard Spil <brnrd freebsd.org>
Reviewed by: ylavic


Follow up to r1803396: CHANGES entry.


Reviewed by: ylavic, jim, covener


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 Support use of optional "tag" in syslog entries. Streamline the patch.
 PR 60525.

Submitted by: jim
Reviewed by: rpluem, jim, mrumph


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https://apache.org/foundation/press/kit/ApacheFoundation_StyleGuide.pdf

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