Make cert-bakup behave differently if btrfs is found and use specific subvolume
for backup of certificates.

Simple btrfs snapshots management tool.

Old banner wasn't conffile, but new ones are. But because the old one wasn't,
opg doesn't have its checksum and thus will not overwrite it with new conffile.

Make sure lighttpd is started before updater so it can correctly report the
progress.

List some more possible signals that could kill the notifier and prevent
leaving the lock in place in such case.

When the lock isn't acquired in reasonable amount of time, give up.

Fix for problem in makefile, which restarts it unconditionally on
installation.

Nothing no review really, the files are not human-readable anyway.

They get mangled somewhere on the way. As it is internal tool, there's
no motivation to track down where, so replacing with simple stars.

Committing without review, as trivial.

Merge branch 'english_notify' of https://github.com/oskar456/turris-misc into oskar456-english_notify

Signed-off-by: Ondřej Caletka <ondrej@caletka.cz>

Recreate the gpg home directory instead of packing it in git. It seems
the format is not transferable.

Also, provide maintenance script to refresh the keys (import
revocations, etc).

And move the directory to .git-gpg, so it doesn't bother people.

While the files are meant to be extracted during the factory reset, it
may be desired to extract a specific file at other occasion as well.
Provide the possibility.

To check the tip of the current git branch is signed.

If unbound is not installed or is disabled, don't even examine it if
it's running.

Add a configuration option to forbid some services from being restarted
by the watchdog.