Merge remote-tracking branch 'origin/PHP-5.6.18' into PHP-5.6.18

* origin/PHP-5.6.18:
  prepare 5.6.18RC1
  Fix test when run with openssl < 1.0.2 (reorder so no more SSLv2 message) Fix skip message to work
  improve fix for bug #71201
  fork test
  fix test
  fork test
  fork test for win32
  fork test
  Use SUCCESS/FAILURE
  Fixed bug #65720 ext/mbstring/libmbfl/filters/mbfilter_cp5022x.c:281: bad if test
  Fix header file include
  Fixed bug #69111 (Crash in SessionHandler::read()). Made session save handler abuse much harder than before.