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

Strnchr() -> memchr().

make sed work on 8-bit objects
TK checking in for Elan Amir

don't access entries multiple times; from Diomidis

change calling convention of mf_fgets, cspace; new externs
match and maxnsub

we can't survive some of the compile errors, just die

fix prototype

date and time created 92/08/23 18:25:59 by bostic