starts the given job and waits until it's running; "stop_check" checks that the current job hasn't been asked to stop. svn path=/nixos/trunk/; revision=33214
rename.nix doesn't allow renaming sets of options... * Renamed nfs-kernel.nix to nfsd.nix * Move NFS client stuff from nfsd.nix to filesystems/nfs.nix. svn path=/nixos/trunk/; revision=33174