Merge r1337344, r1378178, r1397636, r1398025, r1398040, r1398481, r1407004, r1407006, r1407088, r1407528 from trunk:

* support/suexec.c: Add gcc format-string attributes to logging
  functions.  
  (main): Always print uid/gid as unsigned long, and cast to avoid
  warnings (which somewhat defeats the point of the format string
  attrs, but is necessary since the size of gid/uid varies).


remove an unnecessary check in a nest loop of ap_create_environment()


s/;;/;/

No need to test for NULL before calling apr_pstrdup.

No need it apr_pcalloc here, the memory is fully initialized the line just after

cppCheck: unreadVariable - 'serviceFlag' is not used in the function, so remove it

Remove unused code. "Next week" hasn't happened in the last 10 years or so.


log client error at level debug, log broken Host header value


remove some more old unused code


remove obsolete comment from 1.3 days

Submitted by: jorton, pqf, jailletc36, jailletc36, jailletc36, jailletc36, sf, sf, sf, sf
Reviewed/backported by: jim


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* support/rotatelogs.c (post_rotate): Really omit the second arg when
  invoking a post-rotate program, rather than passing an empty arg.
  (Fixes to code match desired&documented behaviour.)

Reviewed by: jorton, jim, sf


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back-to-back valid PR's submitted in the same minute.



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WinNT MPM: Fix thread-safety issue in worker_main().  All
workers were allocating from pchild without holding '
child_lock.  Allocate from ptrans instead.

Related to: PR 52196

The reporter suggests that the apr_thread_t for r->connection->current_thread
should have a unique pool.  This revision handles that for WinNT MPM,
but not for other MPMs.

Submitted by: trawick
Reviewed/backported by: jim


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