Check redirect path and add trailing slash if necessary

http.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"net/url"
 	"path"
+	"strings"
 )
 
 func statusHandler(w http.ResponseWriter, r *http.Request) {
@@ -82,6 +83,10 @@ func redirectHandler(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	if strings.HasSuffix(r.URL.Path, "/") && !strings.HasSuffix(redirectPath, "/") {
+		redirectPath += "/"
+	}
+
 	u := &url.URL{
 		Scheme: scheme,
 		Host:   server.Host,