Alias direct list and alias direct mapping alias options

Alias options:  and
RESTRICTED: Not yet fully implemented.

takes a file specification for a file containing a list of originator addresses (or a URL returning a list of originator addresses).

takes the name of a mapping table through which to run originator addresses.

See also:
 * Alias options
 * Alias file named parameters
 * use_auth_return MTA Option
 * use_canonical_return MTA Option
 * use_orig_return MTA Option
 * ldap_use_async MTA Option