configitems: register the 'web.port' config

mercurial/configitems.py

@@ -628,6 +628,9 b" coreconfigitem('web', 'errorlog',"
 coreconfigitem('web', 'ipv6',
     default=False,
 )
+coreconfigitem('web', 'port',
+    default=8000,
+)
 coreconfigitem('worker', 'backgroundclose',
     default=dynamicdefault,
 )

mercurial/hgweb/server.py

@@ -327,7 +327,7 b' def create_server(ui, app):'
         sys.setdefaultencoding(oldenc)
 
     address = ui.config('web', 'address')
-    port = util.getport(ui.config('web', 'port', 8000))
+    port = util.getport(ui.config('web', 'port'))
     try:
         return cls(ui, app, (address, port), handler)
     except socket.error as inst: