logging: always invoke fileConfig with '__file__' and 'here' WSGI servers tend to provide '__file__' and 'here' as 'defaults' when invoking fileConfig, so '%(here)s' string interpolation also can be used in logging configuration. Make sure we do the same when we initialize logging without using a WSGI server. It is annoying to have to do this, and it will only in rare cases make any difference ... but it seems like the best option. Patch also modified by Mads Kiilerich.