Minor clarification on libvirtd

Clarifies when libvirtd is required.

Change-Id: I2a5b196f662be5bef4e1a0d8372e42af54a1e6a2
Fix bug 1160550, keystoken typo

Change-Id: Ieb70dc6bf0e30c19c22b92fb59bdebd4bd73e43f
Merge "Fix bug 1160550, keystoken typo"