MAILSERV moderator MTA options

RESTRICTED. MAILSERV is not yet fully implemented.

When using MAILSERV, a special MAILSERV moderator user must be set up, that will handle certain MAILSERV functions. MTA options exist to specify this moderator user.

See also:
 * mailserv_moderator_mail MTA Option
 * mailserv_moderator_uid MTA Option
 * mailserv_secret MTA Option
 * MTA options