configitems: register the 'paths' config section

mercurial/configitems.py

@@ -520,6 +520,10 b" coreconfigitem('paths', 'default',"
 coreconfigitem('paths', 'default-push',
     default=None,
 )
+coreconfigitem('paths', '.*',
+    default=None,
+    generic=True,
+)
 coreconfigitem('phases', 'checksubrepos',
     default='follow',
 )