Update to 20.0.4 (#1771148)

Upstream release 20.0.2: https://docs.gunicorn.org/en/20.0.2/news.html

Rebuilt for Python 3.8.0rc1 (#1748018)

Rebuilt for Python 3.8

dropped python2-gunicorn subpackage (RHBZ#1741012)
/usr/bin/gunicorn is now the Python 3 version
fix logging of username with HTTP Basic auth (RHBZ#1730791)

Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild

Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild

Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild

upstream release 19.9.0: http://docs.gunicorn.org/en/19.9.0/news.html

Fix for Python 3.7 (async is a reserved word now)

Rebuilt for Python 3.7

upstream release 19.8.1: http://docs.gunicorn.org/en/19.8.1/news.html

adjusted executable names to match Python packaging guidelines:
2, gunicorn-2.7, gunicorn-3, gunicorn-3.6 (RHBZ#1567198)

Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild

Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild

upstream release 19.7.1: http://docs.gunicorn.org/en/19.7.1/news.html