luci-app-fwknop: Adds a check to not overwrite user configured keys

Signed-off-by: Jonathan Bennett <JBennett@Incomsystems.biz>

applications/luci-app-fwknopd/root/etc/uci-defaults/40_luci-fwknopd

@@ -3,6 +3,7 @@
 #-- Licensed to the public under the GNU General Public License v2.
 . /lib/functions/network.sh
 
+[ "$(uci -q get fwknopd.@access[0].KEY)" != "CHANGEME" ] && exit 0
 uci batch <<EOF
 	add ucitrack fwknopd
 	set ucitrack.@fwknopd[-1].init=fwknopd