man: Document on what other BSDs arc4random(3) is present
diff --git a/man/arc4random.3bsd b/man/arc4random.3bsd
index 107f246..1de6508 100644
--- a/man/arc4random.3bsd
+++ b/man/arc4random.3bsd
@@ -129,7 +129,11 @@ reserved to indicate an error.
.Xr random 3
.Sh HISTORY
These functions first appeared in
-.Ox 2.1 .
+.Ox 2.1 ,
+.Fx 3.0 ,
+.Nx 1.6 ,
+and
+.Dx 1.0 .
.Pp
The original version of this random number generator used the
RC4 (also known as ARC4) algorithm.