Fix manifest view on Windows

mercurial/hgweb.py

@@ -851,7 +851,7 b' class hgweb(object):'
 
     def run(self, req=hgrequest()):
         def clean(path):
-            p = os.path.normpath(path)
+            p = util.normpath(path)
             if p[:2] == "..":
                 raise "suspicious path"
             return p