Add AUTHORS file and script

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

.mailmap

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+# Generate AUTHORS: scripts/generate-authors.sh
+
+# Tip for finding duplicates (besides scanning the output of AUTHORS for name
+# duplicates that aren't also email duplicates): scan the output of:
+#   git log --format='%aE - %aN' | sort -uf
+#
+# For explanation on this file format: man git-shortlog
+
+Dan Finneran <dan@thebsdbox.co.uk> <dan@dev.fnnrn.me>
+Dan Finneran <dan@thebsdbox.co.uk> <daniel.finneran@gmail.com>
+Dave Scott <dave.scott@docker.com> <dave.scott@unikernel.com>
+Dave Scott <dave.scott@docker.com> <dave@recoil.org>
+Dave Scott <dave.scott@docker.com> <djs55@users.noreply.github.com>
+David Sheets <david.sheets@docker.com> <dsheets@docker.com>
+David Sheets <david.sheets@docker.com> <sheets@alum.mit.edu>
+Ian Campbell <ian.campbell@docker.com> <ijc25@users.noreply.github.com>
+Jeremy Yallop <yallop@docker.com> <yallop@gmail.com>
+Justin Cormack <justin.cormack@docker.com> <justin.cormack@unikernel.com>
+Justin Cormack <justin.cormack@docker.com> <justin@specialbusservice.com>
+Mindy Preston <mindy.preston@docker.com> <meetup@yomimono.org>
+Nathan LeClaire <nathan.leclaire@gmail.com> <nathanleclaire@gmail.com>
+Riyaz Faizullabhoy <riyaz.faizullabhoy@docker.com> <riyazdf@berkeley.edu>
+Riyaz Faizullabhoy <riyaz.faizullabhoy@docker.com> <riyazdf@gmail.com>
+Rolf Neugebauer <rolf.neugebauer@docker.com> <rneugeba@users.noreply.github.com>
+Simon Ferquel <simon.ferquel@docker.com> <simon.ferquel@hotmail.fr>
+Thomas Gazagnaire <thomas@gazagnaire.org> <thomas@gazagnaire.com>

AUTHORS

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+# This file lists all individuals having contributed content to the repository.
+# For how it is generated, see `scripts/generate-authors.sh`.
+
+Amir Chaudhry <amirmc@gmail.com>
+Anil Madhavapeddy <anil@recoil.org>
+Dan Finneran <dan@thebsdbox.co.uk>
+Daniel Hiltgen <daniel.hiltgen@docker.com>
+Dave Scott <dave.scott@docker.com>
+Dave Tucker <dt@docker.com>
+David Gageot <david@gageot.net>
+David Scott <dave.scott@docker.com>
+David Sheets <david.sheets@docker.com>
+Dieter Reuter <dieter.reuter@me.com>
+French Ben <frenchben@docker.com>
+Gianluca Arbezzano <gianarb92@gmail.com>
+Ian Campbell <ian.campbell@docker.com>
+Ilya Dmitrichenko <errordeveloper@gmail.com>
+Jeremy Yallop <yallop@docker.com>
+Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>
+Justin Cormack <justin.cormack@docker.com>
+Ken Cochrane <KenCochrane@gmail.com>
+Madhu Venugopal <madhu@docker.com>
+Magnus Skjegstad <magnus@skjegstad.com>
+Michel Courtine <michel.courtine@docker.com>
+Mickaël Salaün <mic@digikod.net>
+Mindy Preston <mindy.preston@docker.com>
+Natanael Copa <natanael.copa@docker.com>
+Nathan LeClaire <nathan.leclaire@gmail.com>
+Richard Mortier <mort@cantab.net>
+Riyaz Faizullabhoy <riyaz.faizullabhoy@docker.com>
+Robb Kistler <robb.kistler@docker.com>
+Rolf Neugebauer <rolf.neugebauer@docker.com>
+Sebastiaan van Stijn <github@gone.nl>
+Simon Ferquel <simon.ferquel@docker.com>
+Theo Koulouris <theo.koulouris@hpe.com>
+Thomas Gazagnaire <thomas@gazagnaire.org>
+Tycho Andersen <tycho@docker.com>

scripts/generate-authors.sh

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+#!/usr/bin/env bash
+set -e
+
+cd "$(dirname "$(readlink -f "$BASH_SOURCE")")/.."
+
+# see also ".mailmap" for how email addresses and names are deduplicated
+
+{
+	cat <<-'EOH'
+	# This file lists all individuals having contributed content to the repository.
+	# For how it is generated, see `scripts/generate-authors.sh`.
+	EOH
+	echo
+	git log --format='%aN <%aE>' | LC_ALL=C.UTF-8 sort -uf
+} > AUTHORS