Signed-off-by: Sebastian Harl <sh@tokkee.org>
Signed-off-by: Florian Forster <octo@leeloo.lan.home.verplant.org>
=over 4
-=item B<Exec> I<User> I<Executable>
+=item B<Exec> I<User>[:[I<Group>]] I<Executable>
-Execute the executable I<Executable> as user I<User>.
+Execute the executable I<Executable> as user I<User>. If the user name is
+followed by a colon and a group name, the program is executed as the specified
+group. If only the colon follows the user name the group defaults to the
+user's login group.
=back