hgweb: inform hgweb.hgweb() entrypoint that paths should be bytes

Differential Revision: https://phab.mercurial-scm.org/D3354

mercurial/hgweb/__init__.py

@@ -38,7 +38,7 b' def hgweb(config, name=None, baseui=None'
     - list of virtual:real tuples (multi-repo view)
     '''
 
-    if ((isinstance(config, str) and not os.path.isdir(config)) or
+    if ((isinstance(config, bytes) and not os.path.isdir(config)) or
         isinstance(config, dict) or isinstance(config, list)):
         # create a multi-dir interface
         return hgwebdir_mod.hgwebdir(config, baseui=baseui)