qemu (1:2.2+dfsg-6exp) unstable; urgency=medium

   Since Debian release 2.2+dfsg-6exp, a new package named qemu-block-extra
   has been created and some less frequently used block backends has been
   split out of main qemu-system binaries and from qemu-img binary to
   this new package.  The backends which has been split are:
     curl
     iscsi
     rbd (ceph/rados)
     ssh
   If you use any of these, please install qemu-block-extra package in
   addition to qemu-system-* or qemu-utils package, because without it
   these block backends wont work anymore.