Assume there is iproutes redirection from port 80/443 to port defined in instance (so public port is 80/443).
Frontend has to be reachable from defaults ports, otherwise it has no sense.

Frontend: Use VirtualHost to separate from custom config, listens to plain http port as well to redirect to https

Conflicts:
	software/kvm/software.cfg

Use new recipes in KVM to make instance not raise when no frontend is found,
Don't request slave kvm frontend instance on SAME machine,
Check if frontend is available using a promise

Use new recipes in KVM to make instance not raise when no frontend is found,
Don't request slave kvm frontend instance on SAME machine,
Check if frontend is available using a promise

This reverts commit 35c5c950.