Now it is not tied go-imap-sql details (with the exception of special
features), allowing it to be used with other storage backends that will
be added in the future.
--unsafe flag is removed and now maddyctl explicitly asks for
confirmation in cases where transaction may be unsafe for connected
clients. --yes flag disables that. In the future, maddy can be
extended with IPC interface to push updates so it this restriction
can be lifted altogether.
1. There is only one version for maddy and imapsql-ctl utility.
This prevents confusion about compatibility.
2. Modified imapsql-ctl understands maddy config format, this allows
it to read needed values from it without the need for lengthy commmand
line arguments.
Closes#148.
