Cross-reference cd(4) and cd9660(5)

MFC after:	3 days

share/man/man4/cd.4

@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 9, 2014
+.Dd April 8, 2022
 .Dt CD 4
 .Os
 .Sh NAME
@@ -339,6 +339,7 @@ None.
 .Sh SEE ALSO
 .Xr cam 4 ,
 .Xr da 4 ,
+.Xr cd9660 5 ,
 .Xr disklabel 8 ,
 .Xr cd 9
 .Sh HISTORY

share/man/man5/cd9660.5

@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd March 22, 2017
+.Dd April 8, 2022
 .Dt CD9660 5
 .Os
 .Sh NAME
@@ -61,6 +61,7 @@ volume located on
 .Sh SEE ALSO
 .Xr nmount 2 ,
 .Xr unmount 2 ,
+.Xr cd 4 ,
 .Xr fstab 5 ,
 .Xr mount 8 ,
 .Xr mount_cd9660 8