#4 (Possibility to) change simulated audio hardware

[Tiziano Müller]

The audio interface for at least Windows 7 and Windows Server 2008 in libvirt should be "ich6" (corresponds to qemu-kvm parameter "-soundhw hda") instead of "ac97" to enable sound without having to use Windows Update on Windows 7. On Windows Server 2008 there aren't even drivers available for ac97.

For Windows XP it should still be ac97 as Intel HD Audio does not seem to be supported there (todo: check).

For Linux "ich6" is also preferred.

See https://bugzilla.redhat.com/show_bug.cgi?id=648486 for further reasons.

We either have to provide distinct profiles or need an interface to set it manually.

[Tiziano Müller]

Involved components:

* LDAP Schema: if it's not already configureable we have to extend the schema
* LDAP Data: updated profiles needed for Windows >= 7 , >=2008 resp.
* vm-manager: updated forms to toggle this
* vm-manager (and possibly daemon): updated LDAP->XML generator