(ipsec, xauth) cleanup ipsec.auth-user.php script before moving to pam.
(ipsec, xauth) cleanup ipsec.auth-user.php script before moving to pam.

The old script had a lot of unused code in it, either stuff that couldn't be configured from OPNsense or dead code.

opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core