4.4BSD snapshot (revision 8.1); add 1993 to copyright

use C library err/warn routines

NULL-terminate cchar arrays for Chris; better information hiding

distribute the rest of the main loop into the modes and cchars modules
bsearch the cchars arrays, minor cleanups

break out rest of keywords into function table that can be bsearch'd

date and time created 91/05/02 13:34:37 by bostic