pathbufs. It is like pathbuf_create but takes responsibility for the path
buffer passed in. (Because this is asymmetric, it carries an extra risk
of error and therefore shouldn't be used except where it's really needed.)
and the metadata required to interpret it. Callers of namei must now
create a pathbuf and pass it to NDINIT (instead of a string and a
uio_seg), then destroy the pathbuf after the namei session is
complete.
Update all namei call sites accordingly. Add a pathbuf(9) man page and
update namei(9).
The pathbuf interface also now appears in a couple of related
additional places that were passing string/uio_seg pairs that were
later fed into NDINIT. Update other call sites accordingly.
dholland