These days salted SHA-256 is considered quite weak for passwords.
Transparently upgrade existing hashes upon login.
Bump cmake requirement to able to use IMPORTED_TARGET, this will allow
further cleanup in next commits.
Some clients will reuse query windows as the client thinks its just a
nick change if you have a existing query window with a module and a different one messages you.
Fix that by using the modules name as the ident.
Update tests to match new modules ident.
The bug was introduced while fixing #1705. If a client did not enable
echo-message, and doesn't have a network, it crashes.
Thanks to LunarBNC for reporting this
