Adjust the path to the default configuration file for the crawler
Adjust the configuration key in the crawler
Adjust sample configuration and default configuration file

This change introduces new configuration key used either by the crawler
or by the web application
Adjust the sample cron job provided for the names of the scripts
Activate and fix mark_not_up2date in the crawler
mm2_update-mirrorlist-server is install by setup.py in /usr/bin
Run the different crons as root, no need for a separate user