Add /etc/security, into which the BSM audit configuration files will be

installed.  This is the same directory as found on Solaris.

NB: In FreeBSD 4.x and earlier, a script (file) named /etc/security
exists.  Does mergemaster need to be taught how to replace a file with
a directory?

Submitted by:	wsalamon
Obtained from:	TrustedBSD Project

etc/mtree/BSD.root.dist

@@ -50,6 +50,8 @@
         ..
         rc.d
         ..
+        security
+        ..
         skel
         ..
         ssh