Merging upstream version 2.1~rc0 (Closes: #1015722).

Signed-off-by: Daniel Baumann <daniel@debian.org>

Documentation/update-docs.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+BUILDDIR="$(mktemp -d)"
+trap 'rm -rf -- $BUILDDIR' EXIT
+
+meson $BUILDDIR -Ddocs=all -Ddocs-build=true
+ninja -C $BUILDDIR
+find $BUILDDIR/Documentation -maxdepth 1 \
+     \( -name '*.1' -o -name '*.html' \) \
+     -exec cp {} Documentation/ \;