diff -r 17919e9006b9 -r 48d2b396cf6c mercurial/configitems.py
--- a/mercurial/configitems.py	Sat Oct 14 00:29:31 2017 +0200
+++ b/mercurial/configitems.py	Sat Oct 14 00:30:14 2017 +0200
@@ -487,6 +487,11 @@
     default=list,
     generic=True,
 )
+coreconfigitem('hostsecurity', '.*:verifycertsfile$',
+    default=None,
+    generic=True,
+)
+
 coreconfigitem('http_proxy', 'always',
     default=False,
 )