configitems: register the 'patchbomb.publicurl' config

hgext/patchbomb.py

@@ -118,6 +118,9 b" configitem('patchbomb', 'from',"
 configitem('patchbomb', 'intro',
     default='auto',
 )
+configitem('patchbomb', 'publicurl',
+    default=None,
+)
 
 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should