Log Message:
Update "apr" package to version 1.2.11. Changes since version 1.2.9:
- Win32 apr_file_read; Correctly handle completion-based read-to-EOF.
- Fixed Win32 regression of stdout inheritance in apr_proc_create.
- Solve winNT inherited pipe leaks by mutexing apr_proc_create calls,
  on WinNT (not WinCE, nor 9x) so that we toggle the inherited state
  of the stdin/out/err pipes.  All other file handles are treated as
  not-inherited until apr_file_dup2'ed a std handle of this process,
  or while they are used by apr_proc_create.
- Define the Mac OS/X filesystem_encoding as utf-8 (in previous
  releases the interpretation would vary).
- Fix day of year (tm_day) calculation for July. The bug only affects
  Windows builds.  Apache Bug #42953.
- Fix LFS detection when building over NFS. The mode must be
  specified when O_CREAT is in the flags to open().
  Apache Bug #42821.
- Avoid overwriting the hash_mutex table for applications that
  incorrectly calls apr_atomic_init().  Apache Bug #42760.
- Allow IPv6 connectivity test to fail, avoiding a potentially fatal
  error.
- The MinGW Windows headers effectively redefines WINADVAPI from
  __stdcall to empty which results in a link failure when wincrypt.h
  is placed after an include to apr_private.h.
  Apache Bug #42293.
- Define SEM_FAILED if it isn't already defined, as the proc mutex
  code already does it. Also search for the sem_open function in
  the realtime library. (This fixes HP-UX sem_open detection).
- Define the _HPUX_SOURCE feature test macro to obtain maximum
  functionality. Fixes broken sendfile with LFS support on HP-UX.
  Apache Bug #42261.