full fix for XSA-226, replacing workaround
drop conflict of xendomain and libvirtd as can cause problems (#1398590)
add-to-physmap error paths fail to release lock on ARM [XSA-235] (#1484476)
Qemu: audio: host memory leakage via capture buffer [CVE-2017-8309] (#1446521)
Qemu: input: host memory leakage via keyboard events [CVE-2017-8379] (#1446561)