foris-controller-openvpn_client: Update and cleanup

Update to the latest version containing few important fixes, but mainly, NATing and firewall management is no longer patched in, but handled by vpn_client module and firewall is setup by uci-default script that is no longer patched in, but included in the package. In the end, this is mostly about cleaning up the package and adding latest bugfixes.

web/foris-controller/foris-controller-openvpn_client-module/files/openvpn_cl.uci

+#!/bin/sh
+
+if ! uci -q get firewall.turris_openvpn_client > /dev/null; then
+	uci batch <<-EOF
+		set firewall.turris_vpn_client=zone
+		set firewall.turris_vpn_client.name='tr_vpn_cl'
+		set firewall.turris_vpn_client.input='REJECT'
+		set firewall.turris_vpn_client.output='ACCEPT'
+		set firewall.turris_vpn_client.forward='REJECT'
+		set firewall.turris_vpn_client.masq='1'
+		set firewall.turris_vpn_client_forward='forwarding'
+		set firewall.turris_vpn_client_forward.src='lan'
+		set firewall.turris_vpn_client_forward.dest='tr_vpn_cl'
+		commit firewall
+	EOF
+fi