Added a Git .mailmap file

(cherry picked from commit a5e1932c)
Fixup .mailmap file

Fix a few issues with the `.mailmap` file.

(cherry picked from commit 3a5de00c)
Consistent documentation for both 'close' and 'shutdown' as inferred destroy methods

Issue: SPR-11680
(cherry picked from commit 14f9dbf)
Polishing