fix: delete a comma for Node.js <= v7.x (#1609)

Author: 3846masa

lib/Server.js

@@ -650,7 +650,7 @@ Server.prototype.checkHost = function (headers, headerToCheck) {
     // if hostHeader doesn't have scheme, add // for parsing.
     /^(.+:)?\/\//.test(hostHeader) ? hostHeader : `//${hostHeader}`,
     false,
-    true,
+    true
   ).hostname;
   // always allow requests with explicit IPv4 or IPv6-address.
   // A note on IPv6 addresses: