The daily snapshots have no associated git tag, so provide a commit hash
instead in these cases. Fix the dpkg detection since the shell would
exit immediately without showing an error message if it weren't found.
Closes#14820
When maketgz invokes this script to generate the docs/RELEASE-TOOLS.md
file that gets bundled in the release, it now also passes on the exact
timestamp and version number so that those details also get mentioned in
the document. They will help users reproduce an identical tarball.
Closes#13319
Generated with scripts/release-tools.sh
The script lists the exact Debian package names and version numbers for
the tools that are used to generate the tarball.
Closes#13239
