lifespan and lifecycle

[milanisko k]

2013/11/28 H. Guémar <hguemar at fedoraproject.org>:
>> 2) We provide 'support' for all supported Fedora releases (not only the
>> latest one) by doing regular image builds including all current updates.
>
>
> Yes, i agree that we should be able to refresh images at a regular basis.
> Ubuntu does it weekly and it's a good cadence.
>

+1
Please note there might be other refresh-triggers besides the "weekly
timeout" such as:
- new kernel
- yum update would fetch more than 50MB
- OpenSSL security issue

Any chance we could implement some rule-based policy rather than a
plain timeout here?