Log Message:
apache24: updated to 2.4.39

Changes with Apache 2.4.39

*) mod_proxy/ssl: Cleanup per-request SSL configuration anytime a backend
   connection is recycled/reused to avoid a possible crash with some SSLProxy
   configurations in <Location> or <Proxy> context.

*) mod_ssl: Correctly restore SSL verify state after TLSv1.3 PHA failure.

*) mod_log_config: Support %{c}h for conn-hostname, %h for useragent_host

*) mod_socache_redis: Support for Redis as socache storage provider.

*) core: new configuration option 'MergeSlashes on|off' that controls handling of
   multiple, consecutive slash ('/') characters in the path component of the \ 
request URL.

*) mod_http2: when SSL renegotiation is inhibited and a 403 ErrorDocument is
   in play, the proper HTTP/2 stream reset did not trigger with \ 
H2_ERR_HTTP_1_1_REQUIRED.

*) mod_http2: new configuration directive: `H2Padding numbits` to control
   padding of HTTP/2 payload frames. 'numbits' is a number from 0-8,
   controlling the range of padding bytes added to a frame. The actual number
   added is chosen randomly per frame. This applies to HEADERS, DATA and PUSH_PROMISE
   frames equally. The default continues to be 0, e.g. no padding.

*) mod_http2: ripping out all the h2_req_engine internal features now that \ 
mod_proxy_http2
   has no more need for it. Optional functions are still declared but no longer \ 
implemented.
   While previous mod_proxy_http2 will work with this, it is recommeneded to run \ 
the matching
   versions of both modules.

*) mod_proxy_http2: changed mod_proxy_http2 implementation and fixed several \ 
bugs which
   resolve bug 63170. The proxy module does now a single h2 request on the (reused)
   connection and returns.

*) mod_http2/mod_proxy_http2: proxy_http2 checks correct master connection \ 
aborted status
   to trigger immediate shutdown of backend connections. This is now always signalled
   by mod_http2 when the the session is being released.
   proxy_http2 now only sends a PING frame to the backend when there is not \ 
already one
   in flight.

*) mod_proxy_http2: fixed an issue where a proxy_http2 handler entered an infinite
   loop when encountering certain errors on the backend connection.

*) mod_http2: Configuration directives H2Push and H2Upgrade can now be specified per
   Location/Directory, e.g. disabling PUSH for a specific set of resources.

*) mod_http2: HEAD requests to some module such as mod_cgid caused the stream to
   terminate improperly and cause a HTTP/2 PROTOCOL_ERROR.

*) http: Fix possible empty response with mod_ratelimit for HEAD requests.

*) mod_cache_socache: Avoid reallocations and be safe with outgoing data
   lifetime.

*) MPMs unix: bind the bucket number of each child to its slot number, for a
   more efficient per bucket maintenance.

*) mod_auth_digest: Fix a race condition. Authentication with valid
   credentials could be refused in case of concurrent accesses from
   different users.

*) mod_http2: enable re-use of slave connections again. Fixed slave connection
   keepalives counter.

*) mod_reqtimeout: Allow to configure (TLS-)handshake timeouts.

*) mod_proxy_wstunnel: Fix websocket proxy over UDS.

*) mod_ssl: Don't unset FIPS mode on restart unless it's forced by
   configuration (SSLFIPS on) and not active by default in OpenSSL.