Use ellipsis in synopsis.

Requested by: bde

lib/libc/sys/semctl.2

@@ -23,7 +23,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $Id: semctl.2,v 1.6 1997/02/22 15:04:18 peter Exp $
+.\" $Id: semctl.2,v 1.7 1997/03/18 23:57:17 bde Exp $
 .\"
 .Dd September 12, 1995
 .Dt SEMCTL 2
@@ -36,13 +36,17 @@
 .Fd #include <sys/ipc.h>
 .Fd #include <sys/sem.h>
 .Ft int
-.Fn semctl "int semid" "int semnum" "int cmd" "union semun arg"
+.Fn semctl "int semid" "int semnum" "int cmd" ...
 .Sh DESCRIPTION
 .Fn Semctl
 performs the operation indicated by
 .Fa cmd
 on the semaphore set indicated by
 .Fa semid .
+A fourth argument, a
+.Fa "union semun arg" ,
+is required for certain values of 
+.Fa cmd .
 For the commands that use the
 .Fa arg
 parameter,