Slaprunner SR: Set resiliency-backup-periodicity parameter so that periodicity is done every  minute.

It is done automatically through the resilient stack.

Otherwise, it breaks slapproxy.
(Even if slapproxy should support it, but that's another story.)

Also add slapos.cookbook to the list of eggs;

This reverts commit 8a6c47bc.

if you provide the parameter "-sla-i-foo", the sla parameter foo is used with the given value for the request of the i^th frontend

This commit introduce the "replicate" software type. The main instance of type replicate will request frontend and transmit to them all the needed configuration so that it seems transparent.

Default state for the requested instance should be the one of the requester

apache-frontend: fix https-only not working

apache-frontend: fix https-only option

apache-frontend: remove unecessary sslengine in http

All Software Releases requesting it need it.