SEE ALSO: add references to keyctl(1) and keyctl(3)

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
diff --git a/man/keyutils.7 b/man/keyutils.7
index 6d88702..5257a6c 100644
--- a/man/keyutils.7
+++ b/man/keyutils.7
@@ -94,6 +94,8 @@
 .SH SEE ALSO
 .ad l
 .nh
+.BR keyctl (1),
+.BR keyctl (3),
 .BR keyrings (7),
 .BR persistent\-keyring (7),
 .BR process\-keyring (7),