Issue #13169: The maximal repetition number in a regular expression has been
increased from 65534 to 2147483647 (on 32-bit platform) or 4294967294 (on
64-bit).
Issue #9669: Protect re against infinite loops on zero-width matching in
non-greedy repeat.  Patch by Matthew Barnett.
Fix test_ssl by replacing expired X509 certificate
Remove unused certificate files