Log Message:
Update to 2.3.0

Changelog:
 * Support for 32-bit KVM guests on 64-bit ARM hosts
 * Support for running KVM under valgrind
 * New IvyBridge CPU model for x86 guests
 * Xen: support for ioreq-server API
 * New 5KEc and 5KEf MIPS64r2, and M14K and M14Kc MIPS32r2
   microMIPS CPU models for MIPS guests
 * Basic support for transactional memory extentions in PowerPC guests
 * Improved VGA support for little-endian PPC/pSeries guests
 * PCI bus support for s390x guests
 * Support for automatic guest device unplug when passthrough devices
   are unbound from VFIO host driver
 * Improved UI performance/support for GTK+/VNC/SDL/Spice, and VNC
   support for multiseat
 * Performance improvements for virtio-blk emulation: asynchronous SCSI
   request handling, and disk read merging.
 * QEMU Guest Agent: now also supports file operations in Windows guests,
   can be used to enable/disable memory blocks in linux guests in
   support for memory hotplug.
 * Migration can now include a JSON description of migration stream to aid
   in identifying incompatibilities betweens guests/hosts.
 * And lots more...