Various wiki bug fixes (#2996)

* Update macaron

* Various wiki bug fixes

vendor/gopkg.in/macaron.v1/util_go17.go

@@ -0,0 +1,25 @@
+// +build !go1.8
+
+// Copyright 2017 The Macaron Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package macaron
+
+import "net/url"
+
+// PathUnescape unescapes a path. Ideally, this function would use
+// url.PathUnescape(..), but the function was not introduced until go1.8.
+func PathUnescape(s string) (string, error) {
+	return url.QueryUnescape(s)
+}