If there has been a problem and the requested action could not be performed,
the exit code is unequal to zero.
+== HOW IT WORKS
+The downloader checks a DNS record for the latest version of the database.
+It will then try to download a file with that version from a mirror server.
+If the downloaded file is outdated, the next mirror will be tried until we
+have found a file that is recent enough.
+
== BUGS
Please report all bugs to the bugtracker at https://bugzilla.ipfire.org/.