Author: Petr Skoda
MDL-26634 LDAP NTLM SSO Multiple subnet separator is not specified and people use a wrong one
Credit goes to Inaki Arenaza.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=416ea17252b70e3d9cf568acaca86df59f1acc14
http://github.com/moodle/moodle/commit/416ea17252b70e3d9cf568acaca86df59f1acc14
+ 1.9 en [auth_ntlmsso_subnet,core_auth]