Adds openstack-manuals and openstack-api-site bug areas to list

Change-Id: I42d6c06f3ccae0d38e078973505bdad7de5a8a32
Closes-bug: 1262834
(cherry picked from commit 1265b2704b0adc57d35078b066bb237f27a4d2d6)
Add information on KVM guest agent feature

Havana added this feature, so documenting in the
configuration reference.

Change-Id: I5e5ae475e24854e48df59d985342bc0c1c52050e
Closes-Bug: 1201652
(cherry picked from commit 9a674bb13750dc26820697603e5c2ddef96463ee)
Merge "Adds openstack-manuals and openstack-api-site bug areas to list" into stable/havana
Merge "Add information on KVM guest agent feature" into stable/havana