manpage: cross link fhreadlink(2) <-> readlink(2)

lib/libsys/fhreadlink.2

@@ -87,7 +87,8 @@ is no longer valid
 .El
 .Sh SEE ALSO
 .Xr fhlink 2 ,
-.Xr fhstat 2
+.Xr fhstat 2 ,
+.Xr readlink 2
 .Sh HISTORY
 The
 .Fn fhreadlink

lib/libsys/readlink.2

@@ -138,6 +138,7 @@ is neither
 nor a file descriptor associated with a directory.
 .El
 .Sh SEE ALSO
+.Xr fhreadlink 2 ,
 .Xr lstat 2 ,
 .Xr stat 2 ,
 .Xr symlink 2 ,