hgwebdir: normalize virtual paths before stripping the separator

It is not even clear that virtual paths should be normalized as normal paths at all, we could expect slash to be the natural separator.

mercurial/hgweb/hgwebdir_mod.py

@@ -16,7 +16,7 b' from hgweb_mod import hgweb'
 class hgwebdir(object):
     def __init__(self, config, parentui=None):
         def cleannames(items):
-            return [(util.pconvert(name.strip(os.sep)), path)
+            return [(util.pconvert(name).strip('/'), path)
                     for name, path in items]
 
         self.parentui = parentui