Added UFW_ALLOW_GW_NET. Changes firewall rules from using GW to the GW network when set to true.

Extended LOCAL_NETWORK to support comma seperated list of /CIDR.

Minor firewall cleanups. Removed specified TCP in range allow. No point, we don't specify tcp/udp anywhere else.

Formatting changes (BASH 3+ style).

Cleaned removed external [ ] calls. Use builtin [[ ]].

Use ${VAR,,} to lowercase isntead of TR.

Dockerfile.armhf

@@ -101,6 +101,7 @@ ENV OPENVPN_USERNAME=**None** \
     TRANSMISSION_WATCH_DIR_ENABLED=true \
     TRANSMISSION_HOME=/data/transmission-home \
     ENABLE_UFW=false \
+    UFW_ALLOW_GW_NET=false \
     UFW_EXTRA_PORTS= \
     TRANSMISSION_WEB_UI=\
     PUID=\