I've tried using standard .ini style configuration directives and that doesn't seem to work. I then poked around in the code and couldn't find where the config files are loaded, though that is likely my unfamiliarity with Python misleading me. Perhaps a quick bit of documentation would shed some light on the subject.
There are currently no configuration files, you can alter the settings through environment variables, through commandline options, or by editing the wrapper script (or even the wiki script directly, although that makes it hard to update). When config files are supported, there will be also full documentation for them. For now, try Script settings. – Radomir Dopieralski
As of version 1.3.0 there are now config files, and they are documented in Script settings. – Radomir Dopieralski