MFC: Document '-p' flag for 'insert' command correctly.

Index: sbin/geom/class/mirror/gmirror.8
===================================================================
RCS file: /private/FreeBSD/src/sbin/geom/class/mirror/gmirror.8,v
retrieving revision 1.4.2.1
retrieving revision 1.5
diff -u -p -r1.4.2.1 -r1.5
--- sbin/geom/class/mirror/gmirror.8	14 Sep 2004 15:49:30 -0000	1.4.2.1
+++ sbin/geom/class/mirror/gmirror.8	18 Sep 2004 19:02:10 -0000	1.5
@@ -22,7 +22,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\" $FreeBSD: src/sbin/geom/class/mirror/gmirror.8,v 1.4.2.1 2004/09/14 15:49:30 pjd Exp $
+.\" $FreeBSD: src/sbin/geom/class/mirror/gmirror.8,v 1.5 2004/09/18 19:02:10 pjd Exp $
 .\"
 .Dd Jul 9, 2004
 .Dt GMIRROR 8
@@ -58,7 +58,8 @@
 .Op Ar prov Op Ar ...
 .Nm
 .Cm insert
-.Op Fl hipv
+.Op Fl hiv
+.Op Fl p Ar priority
 .Ar name
 .Ar prov
 .Op Ar prov Op Ar ...
@@ -182,12 +183,12 @@ hopefully will not be used.
 Add the given component(s) to the existing mirror.
 .Pp
 Additional options include:
-.Bl -tag -width ".Fl h"
+.Bl -tag -width ".Fl p Ar priority"
 .It Fl h
 Hardcode providers' names in metadata.
 .It Fl i
 Mark component(s) as inacitve immediatelly after insertion.
-.It Fl p
+.It Fl p Ar priority
 Specifies priority of the given component(s).
 .El
 .It Cm remove
@@ -290,3 +291,5 @@ utility appeared in
 .An Pawel Jakub Dawidek Aq pjd@FreeBSD.org
 .Sh BUGS
 There should be a way to change component's priority inside a running mirror.
+.Pp
+There should be a section with implementation description.