diff -r 8c42b4a3d447 -r 64de5f44eec3 mercurial/configitems.py
--- a/mercurial/configitems.py	Tue Oct 16 15:48:00 2018 +0200
+++ b/mercurial/configitems.py	Wed Jan 02 03:07:52 2019 +0100
@@ -470,6 +470,9 @@
 coreconfigitem('experimental', 'changegroup3',
     default=False,
 )
+coreconfigitem('experimental', 'cleanup-as-archived',
+    default=False,
+)
 coreconfigitem('experimental', 'clientcompressionengines',
     default=list,
 )