diff -r 263a736aed9b -r 2d07d20d5a78 mercurial/configitems.py
--- a/mercurial/configitems.py	Wed Oct 11 03:54:19 2017 +0200
+++ b/mercurial/configitems.py	Wed Oct 11 04:12:23 2017 +0200
@@ -712,6 +712,9 @@
 coreconfigitem('verify', 'skipflags',
     default=None,
 )
+coreconfigitem('web', 'allowbz2',
+    default=None,
+)
 coreconfigitem('web', 'accesslog',
     default='-',
 )