Author: Ray Morris
MDL-20365 auth_db: Add salted crypt() password hash option
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f97b63bfd16dbb0547f54258f6d3936124d2da45
http://github.com/moodle/moodle/commit/f97b63bfd16dbb0547f54258f6d3936124d2da45
+ 2.9 en [auth_dbsaltedcrypt,auth_db]