[1] uwsgi/psgi_loader.c at master · unbit/uwsgi (2017-06-07 14:39:27 +09:00) <https://github.com/unbit/uwsgi/blob/master/plugins/psgi/psgi_loader.c>
[2] psgi-specs/Extensions.pod at master · plack/psgi-specs (2017-06-07 14:39:49 +09:00) <https://github.com/plack/psgi-specs/blob/master/PSGI/Extensions.pod>