Use `systemctl reload` in logrotate script
    
    In 5f74814 (Use systemctl for sending SIGHUP to the service,
    2015-06-29), a direct call to `kill` was replaced with `systemctl kill`.
    
    This can be simplified using `systemctl reload` instead.  Doing so also
    resolves an issue when `POSIXLY_CORRECT` is set (rhbz#2124488).