perl 5.002gamma: Configure

perl 5.002gamma: Configure

Remove d_vms and d_unlnkallvers constants.  These should be set
in vmsish.h (and optionally undef'd in unixish.h, dosish.h).

Send the &-d info to >&4 so you see it even with -s.

Update unixism comments.

Introduce new nm_so_opt variable that holds options that might be
required for use with nm on shared libraries but that are fatal
if used on archive libraries.

Move suid question closer to top.  This also shuffled a few other
units.

Start varargs testing script with $startsh.

Start O_NONBLOCK testing script with $startsh.

Detect OS/2 early on.