Merge branch 'PHP-5.6'

* PHP-5.6:
  Fix bug #68113 (Heap corruption in exif_thumbnail())
  Fix bug #68089 - do not accept options with embedded \0
  Fixed bug #68044: Integer overflow in unserialize() (32-bits only)
  Fix bug #68027 - fix date parsing in XMLRPC lib
  Fix bug #68113 (Heap corruption in exif_thumbnail())
  Fix bug #68089 - do not accept options with embedded \0
  Fixed bug #68044: Integer overflow in unserialize() (32-bits only)
  Fix bug #68027 - fix date parsing in XMLRPC lib

Conflicts:
	ext/standard/var_unserializer.c
	ext/standard/var_unserializer.re