Log Message:
Update apr to 0.9.20.

Changes with APR 0.9.20

  *) Security: CVE-2011-0419
     Reimplement apr_fnmatch() from scratch using a non-recursive
     algorithm; now has improved compliance with the fnmatch() spec.
     [William Rowe]

  *) Updated config.guess and config.sub.  [Rainer Jung]

  *) Fix flag character '#' in combination with format character 'x' in
     apr snprintf implementations.  [Rainer Jung]