okay deraadt@, millert@, krw@

rescinded 22 July 1999.  Proofed by myself and Theo.

some brave soul should look at it.

to simulate a crypt, like login does.
Use SEEK_* not L_* and kill some 0L's used in lseek while we're there.

opendev.h: ok, so I merged it with util.h
opendev.h: use util.h
everything else: use "util.h"