configitems: register the 'format.dotencode' config

mercurial/configitems.py

@@ -110,6 +110,9 b" coreconfigitem('format', 'aggressivemerg"
 coreconfigitem('format', 'chunkcachesize',
     default=None,
 )
+coreconfigitem('format', 'dotencode',
+    default=True,
+)
 coreconfigitem('hostsecurity', 'ciphers',
     default=None,
 )

mercurial/localrepo.py

@@ -2078,7 +2078,7 b' def newreporequirements(repo):'
         requirements.add('store')
         if ui.configbool('format', 'usefncache', True):
             requirements.add('fncache')
-            if ui.configbool('format', 'dotencode', True):
+            if ui.configbool('format', 'dotencode'):
                 requirements.add('dotencode')
 
     compengine = ui.config('experimental', 'format.compression', 'zlib')