- Makefile: Fix gpg signature (bcl)
    - Add RHEL8_Repo, RHEL8_RepoData, and RHEL8_Url classes (bcl)
    - pylint: Fix warnings and errors from pylint 2.5.x (bcl)
    - i18n: Use gettext instead of lgettext (bcl)
    - Use W9902 in pylint disable to avoid warnings about _ (bcl)
    - Add python 3.8 to travis.yml (bcl)
    - docs: Fix network.py documentation markup (bcl)
    - docs: versionadded directive needs a blank line after it (bcl)
    - docs: Maintain programmers-guide in the repo (bcl)
    - Makefile: Add creating the detached signature to the release make target (bcl)