Use the new roundup URL to prevent server redirection

tryton/config.py

@@ -58,7 +58,7 @@ class ConfigManager(object):
             'client.email': '',
             'client.can_change_accelerators': False,
             'client.limit': 1000,
-            'roundup.url': 'http://bugs.tryton.org/roundup/',
+            'roundup.url': 'http://bugs.tryton.org/',
             'roundup.xmlrpc': 'roundup-xmlrpc.tryton.org',
             'menu.pane': 200,
             'menu.expanded': True,