[Rd] Red Hat 9 regex symbol conflict

[Joe Conway]

Prof Brian Ripley wrote:
> Sorry, my grep missed this: the names used are already remapped in 
> Rregex.h.
> 
> I've made the others static in R-patched.

Just to confirm, R-patched does indeed resolve the issue I was having 
with PL/R on Red Hat 9.

Thanks!

Joe