mechanical rename of vnode to mkfsvnode and buf to mkfsbuf to avoid
collisions with the kernel structures of the same name.
caught one bug where the wrong header was being included.

Add OpenBSD RCS tags; reminded by tb

Import makefs - a tool to create filesystem images from a directory.

This is a rough port of the NetBSD tool with some features removed we
don't need. It compiles, but I don't promise anything more. Importing
now, so we can hack on it in tree.

The supported filesystem types are: cd9660, ffs and msdosfs.

ok deraadt