Clarify how the upstream tarball is produced

The "upstream" tarball is produced using git-archive from the upstream
git branch at github:

2 files changed, 4 insertions, 98 deletions

diff --git a/debian/README.Debian b/debian/README.Debian
index 269c598f..749da0cb 100644
--- a/debian/README.Debian
+++ b/debian/README.Debian
@@ -109,17 +109,9 @@ http://www.boxbackup.org
 "Upstream" tarball
 ------------------
 
-Althogh upstream indeed publishes tarballs, the debian package is no
-longer based on these tarballs. The reason for this is that the
-procedure for creating these tarballs makes package maintenance and
-interaction with upstream unnecessary hard.
+The "upstream" tarball is produced using git-archive from the upstream
+git branch at github:
 
-Moreover, there seem to be different types of tarballs. Official ones
-used for a release and "unofficial" ones that are created for snapshot
-releases, causing further confusion.
+https://github.com/boxbackup/boxbackup
 
-Since upstream releases rather seldomly, but we want to distribute
-pre-releases and integrate patches from the upstream svn, the package
-ships a script in the source that is used to create the orig.tar.gz.
-
- -- Reinhard Tartler <siretart@tauware.de>, Wed, 14 Jun 2017 21:02:45 -0400
+ -- Reinhard Tartler <siretart@tauware.de>, Sat, 17 Jun 2017 17:57:00 -0400
diff --git a/debian/get-orig-source.sh b/debian/get-orig-source.sh
deleted file mode 100644
index d56ab929..00000000
--- a/debian/get-orig-source.sh
+++ /dev/null
@@ -1,86 +0,0 @@
-#!/bin/sh
-#
-#  Script to create a 'pristine' tarball for the debian boxbackup source
-#  package. Copyright (C) 2009, Reinhard Tartler
-#
-#  This program is free software; you can redistribute it and/or modify
-#  it under the terms of the GNU General Public License as published by
-#  the Free Software Foundation; either version 2 of the License, or
-#  (at your option) any later version.
-#
-#  This program is distributed in the hope that it will be useful,
-#  but WITHOUT ANY WARRANTY; without even the implied warranty of
-#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#  GNU General Public License for more details.
-#
-#  You should have received a copy of the GNU General Public License along
-#  with this program; if not, write to the Free Software Foundation, Inc.,
-#  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-set -eu
-
-usage() {
-	cat >&2 <<EOF
-usage: $0 [-dh]
-  -h : display help
-  -r : svn revision
-  -o : output tarball name
-EOF
-}
-
-debug () {
-	$DEBUG && echo "DEBUG: $*" >&2
-}
-
-error () {
-	echo "$1" >&2
-	exit 1;
-}
-
-set +e
-PARAMS=`getopt hr: "$@"`
-if test $? -ne 0; then usage; exit 1; fi;
-set -e
-
-eval set -- "$PARAMS"
-
-DEBUG=false
-SVNREVISION=
-
-while test $# -gt 0
-do
-	case $1 in
-		-h) usage; exit 1 ;;
-		-r) SVNREVISION=$2; shift ;;
-		--) shift ; break ;;
-		*)  echo "Internal error!" ; exit 1 ;;
-	esac
-	shift
-done
-
-# sanity checks now
-dh_testdir
-
-if [ -z $SVNREVISION ]; then
-	error "you need to specify an svn revision."
-fi
-
-PACKAGENAME=boxbackup
-baseurl="https://www.boxbackup.org/svn/box/RELEASE/0.11.1"
-TARBALL=../${PACKAGENAME}_0.11.1~r${SVNREVISION}.orig.tar.gz
-
-TMPDIR=`mktemp -d`
-trap 'rm -rf ${TMPDIR}'  EXIT
-
-
-svn export -r${SVNREVISION} \
-	--ignore-externals \
-	${baseurl}  \
-	${TMPDIR}/${PACKAGENAME}
-
-svn info -r${SVNREVISION} \
-	${baseurl} \
-	| awk '/^Revision/ {print $2}' \
-	> ${TMPDIR}/${PACKAGENAME}/.svnrevision
-
-tar czf ${TARBALL} -C ${TMPDIR} ${PACKAGENAME}