* Merge from debian unstable. Remaining changes: - debian/rules, debian/contro, debian/dkms.conf.in, debian/openvswitch-datapath.dkms.(postinst, prerm): Add dkms support by providindg openvswitch-datapath-dkms. - Make sure we have a directory under /var/run to create the pidfile for openvswitch-controller, backported from upstream