add TCP_NODELAY option

Signed-off-by: Mohammad Shehar Yaar Tausif <sheharyaar48@gmail.com>

openvpn-install.sh

@@ -308,6 +308,14 @@ function installQuestions() {
         ;;
         2)
             PROTOCOL="tcp"
+            until [[ $TCP_NODELAY =~ (y|n) ]]; do
+                read -rp "Do you want to enable TCP_NODELAY (improves latency)? [y/n]: " -e TCP_NODELAY
+            done
+            if [[ $TCP_NODELAY == "y" ]]; then
+                TCP_NODELAY="tcp-nodelay"
+            else
+                TCP_NODELAY=""
+            fi
         ;;
     esac
     echo ""
@@ -897,7 +905,8 @@ tls-version-min 1.2
 tls-cipher $CC_CIPHER
 client-config-dir /etc/openvpn/ccd
 status /var/log/openvpn/status.log
-verb 3" >>/etc/openvpn/server.conf
+verb 3
+    $TCP_NODELAY" >>/etc/openvpn/server.conf
     
     # Create client-config-dir dir
     mkdir -p /etc/openvpn/ccd