Dear Maintainer,

changing the timezone from Europe/Berlin to Etc/UTC led to fail2ban not
banning anything anymore. A bit of research showed that auth.log was still
written in the old timezone, and fail2ban detected a timestamp mismatch and
failed to work.

I did not expect that, and thus it took several days to detect this situation.

Restarting sshd, fail2ban and rsyslog fixed it, though I suspect restarting
sshd (and maybe even fail2ban) wasn't necessary.

As an unsuspecting user, I'd expect that changing the time zone via
`dpkg-reconfigure tzdata` leaves the system in a working state, or at the very
least warn that things could be broken.

Best regards,
Moritz Lenz