gluon-l3roamd: fix interface checks in initscript

The local_node ifstatus must be checked for local-node, not client. While
we're at it, also clean up the syntax a bit.

package/gluon-l3roamd/files/etc/init.d/gluon-l3roamd

@@ -6,12 +6,15 @@ USE_PROCD=1
 PROG=/usr/sbin/l3roamd
 
 start_service () {
+	local interfaces=$(
+		for dev in $(gluon-list-mesh-interfaces); do echo " -m $dev"; done
+		[ "$(ifstatus local_node | jsonfilter -e '@.up')" = 'true' ] && echo ' -i local-node'
+	)
+
 	procd_open_instance
 	procd_set_param stdout 1
 	procd_set_param stderr 1
 	procd_set_param respawn ${respawn_threshold:-3660} ${respawn_timeout:-5} ${respawn_retry:-0}
-	interfaces=$(for dev in $(gluon-list-mesh-interfaces);do echo " -m $dev"; done;
-	[ "$(ifstatus client | jsonfilter -e "@.up")" = "true" ] && echo " -i local-node")
 	procd_set_param command "$PROG" -s /var/run/l3roamd.sock -p $(lua -e 'print(require("gluon.site").prefix6())') $interfaces -t 254 -a $(uci get network.loopback.ip6addr | cut -d/ -f1) -4 0:0:0:0:0:ffff::/96 -b br-client
 	procd_close_instance
 }
@@ -21,6 +24,6 @@ service_triggers() {
 	local name=$(basename "${script:-$initscript}")
 
 	procd_open_trigger
-	procd_add_raw_trigger "interface.*" 0 "/etc/init.d/$name" reload
+	procd_add_raw_trigger 'interface.*' 0 "/etc/init.d/$name" reload
 	procd_close_trigger
 }