configitems: register the 'convert.skiptags' config

hgext/convert/__init__.py

@@ -100,6 +100,9 b" configitem('convert', 'localtimezone',"
 configitem('convert', 'p4.startrev',
     default=0,
 )
+configitem('convert', 'skiptags',
+    default=False,
+)
 
 # Commands definition was moved elsewhere to ease demandload job.