Update git mailmap

[ekohl]

This allows git to map multiple addresses correctly to a single name, which is useful in properly identifying the various authors. Some entries may look redundant, but they assign a proper (single) name where people have used multiple names with the same email address. For example, one with diacritics and one without.

• I am familiar with the contributing guidelines.

Please cherry-pick my commits into:

• Foreman 3.10/Katello 4.12
• Foreman 3.9/Katello 4.11 (planned Satellite 6.15)
• Foreman 3.8/Katello 4.10
• Foreman 3.7/Katello 4.9 (Satellite 6.14)
• Foreman 3.6/Katello 4.8
• Foreman 3.5/Katello 4.7 (Satellite 6.13; orcharhino 6.6/6.7)
• Foreman 3.4/Katello 4.6 (EL8 only)
• Foreman 3.3/Katello 4.5 on EL7 & EL8 (Satellite 6.12 on EL8 only; orcharhino 6.4/6.5 on EL8 only)
• We do not accept PRs for Foreman older than 3.3.

[github-actions]

The PR preview for f5cd0b8 is available at theforeman-foreman-documentation-preview-pr-2921.surge.sh

The following output files are affected by this PR:

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[maximiliankolb]

diff LGTM, but the consequences/benefits are a bit unclear to me. Does this help with the release automation?

Feel free to adjust the commit message and merge.

[ekohl]

diff LGTM, but the consequences/benefits are a bit unclear to me. Does this help with the release automation?

It makes git log better. #2915 was the main motivation. I'll add notes in there that I sent to @apinnick, without copying the results.

[maximiliankolb]

Also read https://git-scm.com/docs/gitmailmap#_description which explains this some more. Feel free to merge.