use Xr more often

src/lib/libc/stdlib/malloc.3

@@ -33,7 +33,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: malloc.3,v 1.7 1997/08/23 10:43:24 pefo Exp $
+.\"	$OpenBSD: malloc.3,v 1.8 1998/04/28 07:36:47 deraadt Exp $
 .\"
 .Dd August 27, 1996
 .Dt MALLOC 3
@@ -164,7 +164,9 @@ is called, even if the initial allocation was big enough.
 This can substantially aid in compacting memory.
 
 .It U
-``utrace'' generate entries for ktrace(1) for all operations.
+``utrace'' generate entries for
+.Xr ktrace 1
+for all operations.
 Consult the source for this one.
 
 .It X

src/lib/libc/stdlib/rand.3

@@ -33,7 +33,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: rand.3,v 1.2 1996/08/19 08:33:44 tholo Exp $
+.\"	$OpenBSD: rand.3,v 1.3 1998/04/28 07:36:49 deraadt Exp $
 .\"
 .Dd June 29, 1991
 .Dt RAND 3
@@ -50,7 +50,8 @@
 .Fn rand void
 .Sh DESCRIPTION
 .Bf -symbolic
-These interfaces are obsoleted by random(3).
+These interfaces are obsoleted by
+.Xr random 3 .
 .Ef
 .Pp
 The

src/lib/libc/string/strtok.3

@@ -33,7 +33,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: strtok.3,v 1.2 1996/08/19 08:34:27 tholo Exp $
+.\"	$OpenBSD: strtok.3,v 1.3 1998/04/28 07:36:55 deraadt Exp $
 .\"
 .Dd June 29, 1991
 .Dt STRTOK 3
@@ -48,7 +48,8 @@
 .Fn strtok "char *str" "const char *sep"
 .Sh DESCRIPTION
 .Bf -symbolic
-This interface is obsoleted by strsep(3).
+This interface is obsoleted by 
+.Xr strsep 3 .
 .Ef
 .Pp
 The