Add additional Parm needed for some OpenVPN providers

pi-hosted_template/template/portainer-v2.json

@@ -3545,6 +3545,12 @@
 					"label": "OPENVPN_PROVIDER",
 					"name": "OPENVPN_PROVIDER"
 				},
+                                {
+                                        "default": "",
+                                        "description": "Optional. Mostly used to narrow down what location to use by the provider",
+                                        "label": "OPENVPN_CONFIG",
+                                        "name": "OPENVPN_CONFIG"
+                                },
 				{
 					"default": "",
 					"label": "OPENVPN_USERNAME",