* If we can't stop/start the daemon through the service system, start it manually in a "hidden" way.
* If we can't access the database (because an older daemon has locked it), don't fail the installation, but warn the user that mysql_upgrade hasn't been run
So two things we need:
* If we can't stop/start the daemon through the service system, start it manually in a "hidden" way.
* If we can't access the database (because an older daemon has locked it), don't fail the installation, but warn the user that mysql_upgrade hasn't been run