[libvirt] [Patch][RFC] Fine grained access control in libvirt by rbac (0/3)

[Syunsuke HAYASHI]

The series of patches introduces a fine grained access control to
libvirt.  They enable libvirt to enforce users what operations to invoke
in role-based way.  Our team found that Konrad and Daniel have similar
interest to ours.  Comments and suggestions are very welcome.

Patches:
 - Embedding hooks in libvirt (1/3)
 - Access control library (2/3)
 - Example policy files (3/3)