configitems: register the 'convert.git.committeractions' config

hgext/convert/__init__.py

@@ -43,6 +43,9 b" configitem('convert', 'cvsps.mergefrom',"
 configitem('convert', 'cvsps.mergeto',
     default=None,
 )
+configitem('convert', 'git.committeractions',
+    default=lambda: ['messagedifferent'],
+)
 
 # Commands definition was moved elsewhere to ease demandload job.
 

hgext/convert/git.py

@@ -110,8 +110,7 b' class convert_git(common.converter_sourc'
             raise error.Abort(_('copying of extra key is forbidden: %s') %
                               _(', ').join(sorted(banned)))
 
-        committeractions = self.ui.configlist('convert', 'git.committeractions',
-                                              'messagedifferent')
+        committeractions = self.ui.configlist('convert', 'git.committeractions')
 
         messagedifferent = None
         messagealways = None