rc-update: add option to remove a service from all runlevels

The -a option,which only applies to the del command, is used to remove a
service from all runlevels.

X-Gentoo-Bug: 497740
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=497740

man/rc-update.8

@@ -21,7 +21,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd May 2, 2009
+.Dd Jan 13, 2014
 .Dt RC-UPDATE 8 SMM
 .Os OpenRC
 .Sh NAME
@@ -35,6 +35,7 @@
 .Op Ar runlevel ...
 .Nm
 .Op Fl s , -stack
+.Op Fl a , -all
 .Ar delete
 .Ar service
 .Op Ar runlevel ...
@@ -86,9 +87,16 @@ If the
 .Fl s , -stack
 option is given then we either add or remove the runlevel from the runlevel.
 This allows inheritance of runlevels.
+
+If the
+.Fl a, -all
+option is given, we remove the service from all runlevels. This is
+useful, for example, to clean up the dangling symlinks after a service
+is removed.
 .Sh SEE ALSO
 .Xr openrc 8 ,
 .Xr openrc-run 8 ,
 .Xr rc-status 8
 .Sh AUTHORS
 .An Roy Marples <roy@marples.name>
+.An The OpenRC Team <openrc@gentoo.org>