[libvirt] Add new API for accessing remote guest text console

[R P Herrold]

On Tue, 17 Aug 2010, Daniel P. Berrange wrote:

> The 'virsh console' command has been an oddity that only works
> when run locally, as the same UID as the QEMU instance. This
> is because it directly opens /dev/pty/XXX. This introduces a
> formal API for accessing consoles that uses the virStreamPtr
> APIs. Now any app can open consoles anywhere it can connect
> to libvirt

This and the patches look LOVELY --- thank you

We presently need to involve an admin level staffer to get 
onto the hosting box in question to be able to see the OOM, 
kernel, and other messages leaking out, and indeed to try to 
connect to a wedged instance.  We had it happen just last week

Getting network socket transport will solve a lot for us. 
Some authentication layer (PKI key mediated access comes to 
mind, similar to keyed SSH access), or ACL's to permit 
exposing specific consoles to specific end customers would 
close the loop

-- Russ herrold