I prefer this ...
--- rc.conf.8 Tue Feb 11 21:24:16 2014
+++ rc.conf.new.8 Fri Jan 3 00:44:18 2014
@@ -47,11 +47,11 @@
.Pp
It is advisable to leave
.Nm rc.conf
-untouched, and instead create and edit a new
+untouched. The
+.Nm rc.conf
+file includes a check for
.Nm rc.conf.local
-file.
-Variables set in this file will override variables previously set in
-.Nm rc.conf .
+which can be used to override variables as required.
.Pp
Some variables are used to turn features on or off.
For example, whether the system runs the
