Fix a bug, accidentally encoded the wrong thing
Update the hostmaster hybrid_property

We need to add a period to the end of an email address that contains a
FQDN, and when we pull the email back out of the database/model we need
to remove the extra period so that it looks good for display purposes.
Do validation of the hostmaster email address

Verify that the email address entered for hostmaster meets the various
requirements:

1. If '@' is in the email address, do some addition checks
2. If the email address contains multiple @ symbols, raise an error
3. If the mailbox part of the email address contains multiple periods,
we can't allow it, because of the way that it is stored in the SOA
record of a DNS server.
Variable to set if we have retrieved list of domains

This way we don't have a flash of content that shouldn't exist.
Change hostmaster input from email to text

Since "hostmaster" is a valid email address, we can't use the email
validator since it requires an @ symbol.
We need to verify mailbox with or without @ in email