function to remove mumble

src/freedombone-app-mumble

@@ -37,6 +37,26 @@ VOIP_PORT=64738
 VOIP_DATABASE="mumble-server.sqlite"
 VOIP_CONFIG_FILE="mumble-server.ini"
 
+function remove_mumble {
+	if !grep -Fxq "install_mumble" $COMPLETION_FILE; then
+		if ! grep -Fxq "install_voip" $COMPLETION_FILE; then
+			return
+		fi
+	fi
+	apt-get -y remove --purge mumble-server
+	iptables -D INPUT -p udp --dport $VOIP_PORT -j ACCEPT
+	iptables -D INPUT -p tcp --dport $VOIP_PORT -j ACCEPT
+	function_check save_firewall_settings
+	save_firewall_settings
+	if [ -f /etc/mumble-server.ini ]; then
+		rm /etc/mumble-server.ini
+	fi
+	sed -i '/install_mumble/d' $COMPLETION_FILE
+	sed -i '/install_voip/d' $COMPLETION_FILE
+	sed -i '/configure_firewall_for_voip/d' $COMPLETION_FILE
+	sed -i '/VoIP /d' $COMPLETION_FILE
+}
+
 function get_voip_server_password {
 	if [ -f /home/$MY_USERNAME/README ]; then
 		if grep -q "VoIP server password" /home/$MY_USERNAME/README; then