Better vpn function names

src/freedombone-app-vpn

     if [ -d /etc/openvpn ]; then
         rm -rf /etc/openvpn
     fi
-    firewall_deny_forwarding
+    firewall_disable_vpn
     remove_completion_param install_vpn
 
     # remove any client keys
 
     create_user_vpn_key $MY_USERNAME
 
-    firewall_allow_forwarding
+    firewall_enable_vpn
     systemctl openvpn start
 
     APP_INSTALLED=1

src/freedombone-utils-firewall

     echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
 }
 
-function firewall_deny_forwarding {
+function firewall_disable_vpn {
     read_config_param EXTERNAL_IPV4_ADDRESS
     if [ ! $EXTERNAL_IPV4_ADDRESS ]; then
         return
     save_firewall_settings
 }
 
-function firewall_allow_forwarding {
+function firewall_enable_vpn {
     curr_external_ipv4_address=$(get_external_ipv4_address)
     iptables -A INPUT -i ${FIREWALL_EIFACE} -m state --state NEW -p udp --dport 1194 -j ACCEPT
     iptables -A INPUT -i tun+ -j ACCEPT