TERMCAPS for v100 and long lines in vi

[utzoo!decvax!harpo!floyd!cmcl2!philabs!sdcsvax!sdccsu3!sdcrdcf!trw-unix!trwspp!wartik]

We had the same problem here, and corrected it by removing the "xn"
and "am" capabilities from the vt100's termcap entry.  VI has to work
a bit harder, but you don't have to change any source code.

P.S. For a good laugh, sign on to VMS, type a line as long as the
width of the screen, and see how they hack around the way their
own terminal does "brain-damaged" handling of wraparound.