rc.d: Eliminate some unnecessary non-POSIX constructs:

* set - ...
 * empty braces
 * ^ in character class

etc/rc.d/routing

@@ -247,6 +247,7 @@ static_atm()
 
 static_ipx()
 {
+	:
 }
 
 ropts_init()

etc/rc.d/syscons

@@ -99,7 +99,7 @@ syscons_configure_keyboard()
 	*)
 		sc_init
 		echo -n ' keychange'
-		set - ${keychange}
+		set -- ${keychange}
 		while [ $# -gt 0 ]; do
 			kbdcontrol <${kbddev} -f "$1" "$2"
 			shift; shift

etc/rc.subr

@@ -1638,7 +1638,7 @@ find_local_scripts_old () {
 				    continue
 				zlist="$zlist $file"
 			done
-			for file in ${dir}/[^0-9]*.sh; do
+			for file in ${dir}/[!0-9]*.sh; do
 				grep '^# PROVIDE:' $file >/dev/null 2>&1 &&
 				    continue
 				slist="$slist $file"