rc: /etc/rc.conf.d may not exist; style updates ;)

src/etc/rc.opnsense

 #!/bin/sh
 
+if [ ! -d /etc/rc.conf.d ]; then
+	exit 0
+fi
+
 # check which services to enable
 . /etc/rc.conf
 for rc_conf in /etc/rc.conf.d/*;
@@ -8,9 +12,7 @@ do
 done
 
 # probe all deamons in /usr/local/etc/rc.d/
-ls /usr/local/etc/rc.d/* | while read rc_filename
-do
-#  echo $rc_filename
+ls /usr/local/etc/rc.d/* | while read rc_filename; do
 	# read rc scripts and parse name and rcvar variables
 	_file=`basename $rc_filename`
 	eval `/usr/bin/grep "name[[:blank:]]*=" $rc_filename | /usr/bin/head -n 1`