configitems: register the 'web.maxshortchanges' config

mercurial/configitems.py

@@ -730,6 +730,9 b" coreconfigitem('web', 'errorlog',"
 coreconfigitem('web', 'ipv6',
     default=False,
 )
+coreconfigitem('web', 'maxshortchanges',
+    default=60,
+)
 coreconfigitem('web', 'motd',
     default='',
 )

mercurial/hgweb/hgweb_mod.py

@@ -112,7 +112,7 b' class requestcontext(object):'
 
         self.maxchanges = self.configint('web', 'maxchanges', 10)
         self.stripecount = self.configint('web', 'stripes')
-        self.maxshortchanges = self.configint('web', 'maxshortchanges', 60)
+        self.maxshortchanges = self.configint('web', 'maxshortchanges')
         self.maxfiles = self.configint('web', 'maxfiles', 10)
         self.allowpull = self.configbool('web', 'allowpull', True)