"log to pt_state directory" option for snowflake-client

[comment:3:ticket:25449 dcf]:

My removal of default logging in 12922a232b was arguably rash: while obviously eventually we would have to stop logging by default, requiring a -log option with a path prevents writing to a log file that's inside the pt_state directory, which, in sandbox situations, may be the only place the transport plugin is allowed to write. obfs4proxy just has a boolean option -enableLogging that doesn't take a path, unconditionally writing to pt_state/obfs4proxy.log. Perhaps something like that would be better, even if it's less convenient for development.

[comment:4:ticket:25449 arlolra]:

Maybe just add another flag, -logToStateDir or the like