OP#575 add kerberos and gssapi sections am PAM

templates/sshd_custom_conf.erb

@@ -31,6 +31,7 @@ AuthorizedKeysCommandUser <%= @ssh_authorized_keys_command_user %>
 PasswordAuthentication <%= @ssh_password_authentication %>
 PermitEmptyPasswords <%= @ssh_permit_empty_passwords %>
 KbdInteractiveAuthentication <%= @ssh_kbd_interactive_auth %>
+UsePAM <%= @ssh_use_pam %>
 
 <% if @ssh_use_kerberos -%>
 KerberosAuthentication <%= @ssh_kerberos_authentication %>