The default configuration of syslog/journald in pretty much all
environments does not include the log level in the message
This means that it's hard to know which log messages are important and
which aren't at a glance, especially in `debug` level.
This commit should make debugging a lot easier by default.
Savvy users who need precise control on the syslog format should
probably use Log4Perl
2f9c7b787e