Retry checking refactored using util function.

middleware/allowed_domains.go

@@ -13,7 +13,7 @@ type AllowedDomains struct {
 }
 
 func (a *AllowedDomains) ProcessRequest(r *client.Request) {
-	if len(a.AllowedDomains) != 0 && !internal.Contains(a.AllowedDomains, r.Host) {
+	if len(a.AllowedDomains) != 0 && !internal.ContainsString(a.AllowedDomains, r.Host) {
 		if _, logged := a.logOnlyOnce.LoadOrStore(r.Host, struct{}{}); !logged {
 			internal.Logger.Printf("Domain not allowed: %s\n", r.Host)
 		}