Fixed mistaken identification of $conf->{'_dbi'}
replaced 'select *' with a list of fields
_getDovecotConfig returns a hash sort-of describing Dovecot's config
%results is a hash, not an array
First argument to _getDovecotConfig should *override* the default
_getPostfixConfig gets Postfix's config
added getMailboxInfo() to get the path to mailboxes
bit more documentation for getMailboxInfo