Document changes and release 5.2.0-1
Document changes and release 5.2.0-1

Commit 0b5e54e is removed from the changelog because it's
superseded by the subsequent commit 453f85d, and documenting
what is, as far as users are concerned, a single change twice
seems weird.

agx/libvirt-debian,agx/libvirt-debian,agx/libvirt-debian,agx/libvirt-debian,agx/libvirt-debian