diff --git a/context/context.go b/context/context.go
index 09fbf3e5..1619812e 100644
--- a/context/context.go
+++ b/context/context.go
@@ -910,7 +910,6 @@ func GetDomain(hostport string) string {
 		host = tmp
 	}
 
-	// has port.
 	switch host {
 	case "127.0.0.1", "0.0.0.0", "::1", "[::1]", "0:0:0:0:0:0:0:0", "0:0:0:0:0:0:0:1":
 		// loopback.
diff --git a/core/netutil/addr.go b/core/netutil/addr.go
index 8419cb14..78ce80c6 100644
--- a/core/netutil/addr.go
+++ b/core/netutil/addr.go
@@ -38,12 +38,11 @@ var IsLoopbackSubdomain = func(s string) bool {
 // GetLoopbackSubdomain returns the part of the loopback subdomain.
 func GetLoopbackSubdomain(s string) string {
 	if strings.HasPrefix(s, "127.0.0.1:") || s == "127.0.0.1" ||
-		strings.HasPrefix(s, "0.0.0.0:") || s == "0.0.0.0" /* let's resolve that without regex (see below)*/ {
+		strings.HasPrefix(s, "0.0.0.0:") || s == "0.0.0.0" {
 		return s
 	}
 
-	ss := loopbackSubRegex.FindString(s)
-	return ss
+	return loopbackSubRegex.FindString(s)
 }
 
 // IsLoopbackHost tries to catch the local addresses when a developer
diff --git a/core/router/router_subdomain_redirect_wrapper.go b/core/router/router_subdomain_redirect_wrapper.go
index 65b4c76e..a6ea31b8 100644
--- a/core/router/router_subdomain_redirect_wrapper.go
+++ b/core/router/router_subdomain_redirect_wrapper.go
@@ -115,7 +115,7 @@ func (s *subdomainRedirectWrapper) Wrapper(w http.ResponseWriter, r *http.Reques
 	if loopback := netutil.GetLoopbackSubdomain(root); loopback != "" {
 		root = strings.Replace(root, loopback, context.GetDomain(host), 1)
 	}
-	// println("root: " + root)
+
 	hasSubdomain := host != root
 
 	if !hasSubdomain && !s.isFromRoot {