do not redirect after auth.logout() if next is None

gluon/contrib/webclient.py

@@ -150,8 +150,6 @@ class WebClient(object):
                 match = self.session_regex.match(cookie)
                 if match:
                     name = match.group('name')
-                    print repr(cookie)
-                    print name, self.sessions.get(name,None), value
                     if name in self.sessions and self.sessions[name] != value:
                         raise RuntimeError('Broken sessions %s' % name)
                     self.sessions[name] = value