Right now, all the profiling runs are started in one point @ setup.php where a lot of "things" already have happened (db connections, load config...).

The objective is to be able to start those runs earlier, so those "things" will be also profiled. To achieve this, the site being profiled should have one complete working configuration of the profiling options defined in the config.php file.

Make it compatible (and mutually exclusive) with the current (later) profiling implementation.