Inclusion of cyrus-imapd and mimedefang

[seth vidal]

> I agree with Chris. Although, I don't like the default install configurations
> installing multiple tools that all do the same thing. Perhaps the default
> should be to only provide either cyrus-imap or dovecot?

I disagree in this case.

Cyrus and dovecot handle imap for two different scales of systems right
now. Cyrus being a larger more complex system and dovecot being much
more straightforward.

-sv