Add a getHostname to system
It is better to abstract how we retrieve the hostname than to access
it directly (see also getAppVersion).
#!/usr/bin/env python
"""
Daily cleanup job.
Can be run as a cronjob to clean out old data from the database (only expired
sessions at the moment).
"""
from django.core import management
if __name__ == "__main__":
management.call_command('cleanup')