bsd-snprintf.c and NeXT.

[Ben Lindstrom]

I'm wonder if anyone happens to have a simplier (slower) version of
bsd-snprintf.c.  It seems NeXT 3.3 (unsure about 4.2) is missing
mprotect().

If I could get something to replace that for a while and fix some of
theses utmp in login.c issues I may have a rough port NeXT to black
hardware.=)

Thanks