* Merge from Debian unstable (LP: #728586, LP: #789117), remaining changes: - debian/nfs-common.{statd,statd-mounting,gssd,idmapd}.upstart, debian/control, debian/nfs-common.{preinst,postinst,prerm,postrm}, debian/rules: drop nfs-common init script in favor of upstart jobs, and build-depend on debhelper (>= 7.3.15ubuntu3) for correct upstart init handling. - Depend on rpcbind (>= 0.2.0-6ubuntu1) for upstart support. - debian/nfs-kernel-server.postinst: don't call "invoke-rc.d nfs-common" in the postinst, this is redundant anyway and the nfs-common init script is gone now. - nfs-kernel-server.default: Add comment about how to disable nfs4. - debian/patches/multiarch-kerberos-paths: Search for kerberos libs in multiarch locations. - nfs-kernel-server.init: Unmount nfsd fs when init script stops - ubuntu-fix-kernel-version-handling: avoid segfaults from short kernel version numbers.