[Libvir] [PATCH] Update hvsupport page

The three independent patches attached update the hvsupport page: (1) Document that KVM now supports save & restore. [Q: This is just kvm, or any qemu?] (2) Document the introduction of virDomainMigrate call. (3) Document the introduction of virDomainBlockStats and virDomainInterfaceStats calls. Rich. -- Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/ Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 03798903