[uwsgi] [glance] Support for wsgi-manage-chunked-input in uwsgi: glance-api finally working over SSL as expected

Hi, It was quite famous that we had no way to run Glance under Python 3 with SSL, because of eventlet, and the fact that Glance needed chunked-input, which made uwsgi not a good candidate. Well, this was truth until 12 days ago, when uwsgi 2.0.18 was released, adding the --wsgi-manage-chunked-input. I've just installed Glance this way, and it's finally working as expected. I'll be releasing Glance in Debian Buster this way. I believe it's now time to make this config the default in the Gate, which is why I'm writing this message. I hope this helps, Cheers, Thomas Goirand (zigo)