diff -r 03f7db5f8e71 -r ec45d7a6d799 mercurial/configitems.py
--- a/mercurial/configitems.py	Wed Oct 11 02:26:09 2017 +0200
+++ b/mercurial/configitems.py	Wed Oct 11 05:01:55 2017 +0200
@@ -520,6 +520,10 @@
 coreconfigitem('paths', 'default-push',
     default=None,
 )
+coreconfigitem('paths', '.*',
+    default=None,
+    generic=True,
+)
 coreconfigitem('phases', 'checksubrepos',
     default='follow',
 )