J.Bayer's VTREE program

[Andrew Weeks]

J.Bayer's Vtree program, to print directory hierarchies, which is supposed
to work on BSD, in fact has SysV dependencies.

First, it uses getopt. Actually I have this anyway, and is PD, so that
is not a serious problem.

Second, it uses `getcwd' instead of `getwd', and `memset' instead of `bzero'.
In fact the bzero call is in the text, but is commented out, not ifdef'ed.

I thought programs in comp.sources.unix were supposed to be tested, or at
least compiled, before being broadcast.