Mention fileassoc dependencies

share/man/man4/options.4

@@ -1,4 +1,4 @@
-.\"	$NetBSD: options.4,v 1.453 2016/11/22 04:55:10 mrg Exp $
+.\"	$NetBSD: options.4,v 1.454 2016/11/26 13:54:34 christos Exp $
 .\"
 .\" Copyright (c) 1996
 .\" 	Perry E. Metzger.  All rights reserved.
@@ -30,7 +30,7 @@
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
 .\"
-.Dd November 21, 2016
+.Dd November 26, 2016
 .Dt OPTIONS 4
 .Os
 .Sh NAME
@@ -1572,6 +1572,10 @@ while in
 .It Cd options FILEASSOC
 Support for
 .Xr fileassoc 9 .
+Required for
+.Cd options PAX_SEGVGUARD
+and
+.Cd pseudo-device veriexec .
 .It Cd options FILEASSOC_NHOOKS=integer
 Number of storage slots per file for
 .Xr fileassoc 9 .
@@ -2317,6 +2321,8 @@ See
 for more details.
 .It Cd options PAX_SEGVGUARD=value
 Enables PaX Segvguard.
+Requires
+.Cd options FILEASSOC .
 .Pp
 The
 .Ar value