Mojo::Log: log->level ignored in favor of MOJO_LOG_LEVEL

[powerman]

Doc says "defaults to the value of the MOJO_LOG_LEVEL" at
https://github.com/kraih/mojo/blob/master/lib/Mojo/Log.pm#L134

But implementation completely ignore log->level when MOJO_LOG_LEVEL set:
https://github.com/kraih/mojo/blob/master/lib/Mojo/Log.pm#L50

If this is intentional behavior then doc should be improved, because now it sounds like MOJO_LOG_LEVEL used to provide initial value for log->level instead of "debug".
If not - then it's a bug.

Also, when MOJO_LOG_LEVEL is set log->level return wrong value ("debug").

[kraih]

Thanks, fixed.