qemu: Try to use QMP for send-key if supported
qemu: Try to use QMP for send-key if supported

Instead of always using HMP use the QMP send-key command introduced in qemu 1.3.

olafhering/libvirt,shugaoye/libvirt,shugaoye/libvirt,crobinso/libvirt,cbosdo/libvirt,datto/libvirt,olafhering/libvirt,zippy2/libvirt,eskultety/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,eskultety/libvirt,fabianfreyer/libvirt,rlaager/libvirt,nertpinx/libvirt,jfehlig/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,jfehlig/libvirt,libvirt/libvirt,shugaoye/libvirt,shugaoye/libvirt,zippy2/libvirt,eskultety/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,crobinso/libvirt,elmarco/libvirt,shugaoye/libvirt,cbosdo/libvirt,andreabolognani/libvirt,agx/libvirt,taget/libvirt,rlaager/libvirt,jardasgit/libvirt,zippy2/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,taget/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,taget/libvirt,rlaager/libvirt,zhlcindy/libvirt-1.1.4-maintain,agx/libvirt,fabianfreyer/libvirt,datto/libvirt,datto/libvirt,cbosdo/libvirt,jfehlig/libvirt,elmarco/libvirt,VenkatDatta/libvirt,crobinso/libvirt,zhlcindy/libvirt-1.1.4-maintain,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,agx/libvirt,elmarco/libvirt,cbosdo/libvirt,taget/libvirt,agx/libvirt,eskultety/libvirt,agx/libvirt,andreabolognani/libvirt,libvirt/libvirt,taget/libvirt,nertpinx/libvirt,zhlcindy/libvirt-1.1.4-maintain,rlaager/libvirt,VenkatDatta/libvirt,elmarco/libvirt,cbosdo/libvirt,libvirt/libvirt,andreabolognani/libvirt,elmarco/libvirt,jardasgit/libvirt,olafhering/libvirt,olafhering/libvirt,datto/libvirt,datto/libvirt,rlaager/libvirt,zhlcindy/libvirt-1.1.4-maintain,andreabolognani/libvirt,crobinso/libvirt,eskultety/libvirt,libvirt/libvirt,fabianfreyer/libvirt,zippy2/libvirt