4.4BSD snapshot (revision 8.1); add 1993 to copyright
Add include files to get prototype declarations, and fix bugs found.
new copyright notice
add Berkeley specific header, written for compatibility
added LIBC_SCCS condition for sccs ids
Add copyright
round up seconds so it doesn't return zero if there's time left.
date and time created 83/06/10 21:58:57 by sam