Bump year in copyright information to 2022 and adjust same scripts
to reference NOTICE that didn't have the reference yet.
This patch also removes orphaned test/expected/utils.out.
Writing a shell script correctly can be hard even for a skilled
programmer. shellcheck is a static analysis tool that helps catch
common errors in shell scripts. We now have 36 executable scripts in
our repository, for which shellcheck reports 126 errors (calculated
like find . -type f -executable -exec bash -c '[ "$(file --brief
--mime-type "$1")" == "text/x-shellscript" ]' sh {} \; -exec shellcheck
-f gcc --exclude=SC2086 {} \; | cut -d: -f1 | sort | uniq | wc -l).
This commit fixes these warnings and adds a GitHub actions workflow
that runs shellcheck on all the executable shell scripts in the
repository. The warning SC2086: Double quote to prevent globbing and
word splitting is disabled globally, because it has little practical
consequences, sometimes leads to false positives, and is general is too
widespread because people forget to quote.
Using pg_dump/pg_restore for a database with hypertables will back
up all internal tables too, which is sometimes not desired. These
scripts allow one to backup regular PostgreSQL tables separately
and then pick and choose which hypertables to backup and restore.
This also provides a forward-compatible way of backing up and
restoring hypertables, since data is dumped to CSV and restored
by re-creating and re-inserting the data.
