mailmap: Canonicalize several contributors.

Author: timabbott

Diff for: .mailmap

@@ -1,16 +1,25 @@
 Aman Agrawal <f2016561@pilani.bits-pilani.ac.in>
 Anders Kaseorg <anders@zulip.com> <anders@zulipchat.com>
 Anders Kaseorg <anders@zulip.com> <andersk@mit.edu>
-Jessica McKellar <jesstess@zulip.com> <jesstess@humbughq.com>
+Jessica McKellar <jesstess@mit.edu> <jesstess@humbughq.com>
+Jessica McKellar <jesstess@mit.edu> <jesstess@zulip.com>
+Kevin Mehall <km@kevinmehall.net> <kevin@humbughq.com>
+Kevin Mehall <km@kevinmehall.net> <kevin@zulip.com>
 Luke Faraone <lfaraone@zulip.com> <lfaraone@humbughq.com>
+Reid Barton <rwbarton@gmail.com> <rwbarton@humbughq.com>
 Rein Zustand (rht) <rhtbot@protonmail.com>
 Rishi Gupta <rishig@zulip.com> <rishig@zulipchat.com>
+Scott Feeney <scott@oceanbase.org> <scott@humbughq.com>
+Scott Feeney <scott@oceanbase.org> <scott@zulip.com>
 Steve Howell <showell@zulip.com> <showell30@yahoo.com>
 Steve Howell <showell@zulip.com> <showell@zulipchat.com>
 Steve Howell <showell@zulip.com> <steve@zulip.com>
 Tim Abbott <tabbott@zulip.com> <tabbott@humbughq.com>
 Tim Abbott <tabbott@zulip.com> <tabbott@mit.edu>
 Tim Abbott <tabbott@zulip.com> <tabbott@zulipchat.com>
+umkay <ukhan@zulipchat.com> <umaimah.k@gmail.com>
+Waseem Daher <wdaher@zulip.com> <wdaher@dropbox.com>
+Waseem Daher <wdaher@zulip.com> <wdaher@humbughq.com>
 Zev Benjamin <zev@zulip.com> <zev@dropbox.com>
 Zev Benjamin <zev@zulip.com> <zev@humbughq.com>
 Zev Benjamin <zev@zulip.com> <zev@mit.edu>