Dear Maintainer,

The configuration when first installed doesn't log errors in zone files, making
it difficult to troubleshoot why a newly-added zone isn't working. Neither the
system journal, nor the files in /var/log/yadifa/ had any error indications.

I eventually figured out that adding these lines in the <loggers> section would
give me the debugging information I needed in the journal:

  database  *  stdout
  zone  *  stdout

I think doing this by default in the Debian package might be beneficial to
others also using yadifa for the first time.