search the diff for "if domain in self.domain_rootdns" to see the actual differences among all the lint warnings.
original bug: https://issues.kolab.org/show_bug.cgi?id=5202
this patch is not needed anymore, the problem has already been fixed in another commit in October 2015. see https://issues.kolab.org/show_bug.cgi?id=5202#c5 for details