Updates after mod_http2 backport



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Fix mod_h2/github issue #126: correct lifetime of data sent on temp pools

* modules/http2/h2_bucket_beam.c 
  - ignore send pools that are sub-pools of the existing one
  - added h2_beam_send_from() to allow explicit registering of the
    correct pool for the sending

* modules/http2/h2_bucket_beam.h
  - add prototype for h2_beam_send_from()

* modules/http2/h2_mplx.c
  - adding logging of output beam state

* modules/http2/h2_stream.c
  - register stream pool for sending data on input beam

* modules/http2/h2_task.c
  - register task pool on output beam on creation
  - adding trace logging
 
* modules/http2/h2_proxy_session.c
  - fixing a type in a comment while we're at it



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backend connection, happening with LogLevel trace2 or higher configured,
or at any log level with compilers not detected as C99 compliant (e.g.
MSVC on Windows).



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In 2.4, they are generated by LimitRequestBody failures. trunk no 
longer uses error buckets in this path, but someone else could.

PR60375

Submitted By: Eric Covener,Lubos Uhliarik <luhliari  redhat.com>
Committed By: covener




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We are already checking an even narrower set of characters
just below.



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fix indent


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 *) mod_proxy_fcgi, mod_fcgid: Fix crashes in ap_fcgi_encoded_env_len() when
    modules add empty environment variables to the request. PR60275.
    [<alex2grad AT gmail.com>]

Submitted By: <alex2grad AT gmail.com>]
Committed By: covener




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on zOS, isascii() really means 7 bit ascii, but our strings
are in ebcdic for 99.95% of the lifetime of the server.



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semantics to respectively warn the caller and cleanly terminate the connection
afterwards.

Suggested by: rpluem



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"686: warning: 'ok' may be used uninitialized in
this function"
This is a false positive, because the value of "ok"
will only be used if stapling_get_cached_response()
sets "rsp" to non-NULL in which case it will always
have set "ok".


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build of mod_socache_memcache. It now needs
mod_status.h.

Untested but exactly analogous to what works for
mod_socache_shmcb and others.


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apr_uint64_t on some platforms.

Followup to r1649491.


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are already or about to be closed.



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On graceful shutdown/restart, kill kept-alive connections before poll()ing
again, avoiding to wait for their "normal" timers (before being woken up)
when they remain the last handled connections.



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process exit.


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filtered out from the outgoing brigade by ap_http_outerror_filter() applying
the EOC semantic.


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PR60478

Submitted By: Jeff Wheelouse <apache wheelhouse.org>
Committed By: covener


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