Fix #1526 trailing slash to any route (#1563)

* refs #1526: Add tests for trailing slash requests with nested any routes

* refs #1526: Handle specual router case with trailing slash for non-root any route

* refs #1526: Fix accidential lookup for any route without trailing slash in request

router.go

@@ -355,6 +355,10 @@ func (r *Router) Find(method, path string, c Context) {
 
 		// Attempt to go back up the tree on no matching prefix or no remaining search
 		if l != pl || search == "" {
+			// Handle special case of trailing slash route with existing any route (see #1526)
+			if path[len(path)-1] == '/' && cn.findChildByKind(akind) != nil {
+				goto Any
+			}
 			if nn == nil { // Issue #1348
 				return // Not found
 			}