- implement domains.forms.CreateHostingDomainForm
- implement domains.models.HostingDomainManager.create_for_hosting_package that
takes care of creating the necessary database objects for hosting domains
assigned to a hosting package
- add new domains.apps.AppConfig to allow translatable app description for
domains app
- link domains to a customer
- extract common functionality from domains.models.MailDomain into abstract
domains.models.DomainBase
- add separate domains.models.HostingDomain to allow for generic external
domains
- add new hostingpackages.models.CustomerHostingPackageDomain to assign hosting
domains to hosting packages