share: move config item declarations into core These config items control share behavior that is implemented in core. Since the functionality is implemented in core, extensions may leverage it. Mozilla has one such extension. And, it needs to access share.pool. Before this patch, a devel warning regarding accessing an unregistered config option would be issued unless the share extension were loaded. Moving the registration of the config options to core fixes this.

--- a/mercurial/configitems.py	Sat Nov 04 23:39:54 2017 -0400
+++ b/mercurial/configitems.py	Mon Nov 06 10:33:40 2017 -0800
@@ -790,6 +790,12 @@
 coreconfigitem('server', 'zliblevel',
     default=-1,
 )
+coreconfigitem('share', 'pool',
+    default=None,
+)
+coreconfigitem('share', 'poolnaming',
+    default='identity',
+)
 coreconfigitem('smtp', 'host',
     default=None,
 )