Xr random 4 in a better way

src/lib/libc/crypt/arc4random.3

@@ -1,4 +1,4 @@
-.\" $OpenBSD: arc4random.3,v 1.35 2014/11/25 16:45:24 millert Exp $
+.\" $OpenBSD: arc4random.3,v 1.36 2019/09/28 15:00:44 deraadt Exp $
 .\"
 .\" Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
 .\" All rights reserved.
@@ -30,7 +30,7 @@
 .\"
 .\" Manual page, using -mandoc macros
 .\"
-.Dd $Mdocdate: November 25 2014 $
+.Dd $Mdocdate: September 28 2019 $
 .Dt ARC4RANDOM 3
 .Os
 .Sh NAME
@@ -68,7 +68,9 @@ On each call, a cryptographic pseudo-random number generator is used
 to generate a new result.
 One data pool is used for all consumers in a process, so that consumption
 under program flow can act as additional stirring.
-The subsystem is re-seeded from the kernel random number subsystem using
+The subsystem is re-seeded from the kernel
+.Xr random 4 
+subsystem using
 .Xr getentropy 2
 on a regular basis, and also upon
 .Xr fork 2 .