Add new script ifsetup, which resets the rc files for initializing
tunnels, interfaces, routes, and delay links. Currently in the freebsd subtree, it will move to the common directory at some point. When used with either -i or -u, it will also run the rc files, either to install (-i) or to uninstall (-u). I suppose a logical option would be a -r option to reinit (uninstall, followed by install), and that would be easy to add. Also takes a -j option to specify a vnodeid (jail), which does all the same stuff, but just for the specified jail node (tmcd changed to return vnode specific data). So, this script can be used to set up the phys node, or any single virtual node on that phys node. Changed delaysetup to take the same options (-i, -u, -j), and I call delaysetup from ifsetup, passing the options along.