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Add macro for attribute alloc_size on newer gcc's


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errors in .htaccess as non-fatal.
PR 52439



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as a URL in per-dir context.



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for overflow.

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excluded from this cleanup as they must be signature identical to the
clib functions, and although the definition of size_t has been flakey,
the definition of those functions appears to be generally clean since
ANSI C.

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in mod_proxy.  

The checks and comment are a vestige of 2.0.x
mod_proxy_http where the backend proxy conn was stored in 
the frontend r->conn_config, but ap_proxy_determine_connection()
doesn't associate the frontend and backend conns like this.




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The guts of mod_proxy is not really ready for the addr and host on a 
proxy_conn_rec to change over time and differ from the 1 cached in the worker.

* proxy_worker->cp->addr needs to know what host/port it cached
* conn->addr and conn->hostname need to be allocated from their own subpool
  so they can be cleared as they change
* ap_proxy_determine_connection needs to be more careful about which
  addr is the TCP endpoint and what we have in either cache.
* may need to avoid updating the proxy_worker addr cache if we know
  the value is flipping.



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the case of mod_access_compat)
PR52406



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Doc tweaks


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Add new section "Other Hooks" for those that don't fit into "Startup Hooks"
or "Request Hooks"


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introduced a few days ago).


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with respect to #ifdef.


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The behavior is undefined according to C99 6.10.3.11 and it breaks with
xlc on AIX

PR: 52394


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PR: 52256
Submitted by: Rainer Canavan <rainer-apache 7val com>


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Testing under Windows is welcome

PR: 29941 


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Don't use APLOG_STARTUP since at that point, the error log is already
available. This gives us timestamps if these errors happen during graceful
restart.

Use level 'emerg' as these errors are fatal.


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