Option to boot from virtualmedia

[SchwarzM]

What would you like to be added:
I would like to discuss if we can add an option to boot from virtual-media instead of network boot.

Why is this needed:
This would decouple the server from any and all boot related network requirements (DHCP relay etc.)

Pro's:

• no more network dependency for booting
• less blackbox as the mount is an api call which can be verified

Con's:

• might be vendor specific
• more bandwidth on oob connection needed