mailmap: Consolidate some original Zulip authors.

I expect this will fix them appearing as duplicates.

Author: timabbott

.mailmap

@@ -1,11 +1,17 @@
 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>
+Luke Faraone <lfaraone@zulip.com> <lfaraone@humbughq.com>
 Rishi Gupta <rishig@zulip.com> <rishig@zulipchat.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>
+Zev Benjamin <zev@zulip.com> <zev@dropbox.com>
+Zev Benjamin <zev@zulip.com> <zev@humbughq.com>
+Zev Benjamin <zev@zulip.com> <zev@mit.edu>
+Zev Benjamin <zev@zulip.com> <zev@strangersgate.com>
 Zixuan James Li <p359101898@gmail.com> <359101898@qq.com>