Fix eslint issues

Author: dometto

lib/configproxy.js

@@ -502,11 +502,12 @@ export class ConfigurableProxy extends EventEmitter {
       options.target.searchParams.set("url", req.url);
       options.target.pathname = options.target.pathname + code.toString()
 
+      var url = "";
       if (options.target.socketPath) {
         options.target.hostname = 'localhost'        
-        var url = options.target.toString().substring(5) // chop off unix+
+        url = options.target.toString().substring(5) // chop off unix+
       } else {
-        var url = options.target.toString()
+        url = options.target.toString()
       }
 
       this.log.debug("Requesting custom error page: %s", url);