Fix resolv.conf detection

Some systems have other DNS servers along with 127.0.0.53 in /etc/resolv.conf

README.md

@@ -13,7 +13,7 @@ Run the script and follow the assistant:
 Once it ends, you can run it again to add more users, remove some of them or even completely uninstall OpenVPN.
 
 ### I want to run my own VPN but don't have a server for that
-You can get a VPS from just $1/month at [VirMach](https://billing.virmach.com/aff.php?aff=4109&url=billing.virmach.com/cart.php?gid=18).
+You can get a VPS from just 2€/month at [AlphaVPS](https://alphavps.com/clients/aff.php?aff=474&pid=422).
 
 ### Donations
 

openvpn-install.sh

@@ -290,13 +290,13 @@ server 10.8.0.0 255.255.255.0" > /etc/openvpn/server/server.conf
 		1|"")
 			# Locate the proper resolv.conf
 			# Needed for systems running systemd-resolved
-			if grep -q '^nameserver 127.0.0.53' "/etc/resolv.conf"; then
-				resolv_conf="/run/systemd/resolve/resolv.conf"
-			else
+			if grep '^nameserver' "/etc/resolv.conf" | grep -qv '127.0.0.53' ; then
 				resolv_conf="/etc/resolv.conf"
+			else
+				resolv_conf="/run/systemd/resolve/resolv.conf"
 			fi
 			# Obtain the resolvers from resolv.conf and use them for OpenVPN
-			grep -v '^#\|^;' "$resolv_conf" | grep '^nameserver' | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | while read line; do
+			grep -v '^#\|^;' "$resolv_conf" | grep '^nameserver' | grep -v '127.0.0.53' | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | while read line; do
 				echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server/server.conf
 			done
 		;;