[tlbuild] duplicates in win32

[Vladimir Volovich]

"GNW" == George N White writes:

 >>> * simplify the problem of sorting out messy hash-bang lines (if the
 >>> scripts are not going to be executed, the first line can be a
 >>> comment indicating the "language", e.g., perl, ruby, etc.).

 >> if we're going to do such change, why not simply put a hash-bang
 >> there?

 GNW> Authors like to use "#! /usr/bin/perl", but on older systems that
 GNW> may be a really old perl, so path will have been set to use a
 GNW> different perl.

that's why we are using "#!/usr/bin/env perl" in such cases. :-)

Best,
v.