Compare the configured base DNs of domains that are visible as to be able to associate child domain name spaces with parent domain name spaces.
Summary: Domain validation: Consider child domains by comparing base DNs
Test Plan: No particular test plan in particular
Reviewers: Web Administration Panel Developers, machniak
Reviewed By: Web Administration Panel Developers, machniak
Subscribers: dhoffend, machniak, pokorra
Maniphest Tasks: T435
Differential Revision: https://git.kolab.org/D10