configitems: register the 'hostsecurity.minimumprotocol' config

mercurial/configitems.py

@@ -460,6 +460,9 b" coreconfigitem('hostsecurity', 'ciphers'"
 coreconfigitem('hostsecurity', 'disabletls10warning',
     default=False,
 )
+coreconfigitem('hostsecurity', 'minimumprotocol',
+    default=dynamicdefault,
+)
 coreconfigitem('http_proxy', 'always',
     default=False,
 )