[perl #41500] [TODO] config - lib directory needs to be set appropriately for 32/64 bit archs

This ticket has been open for more than two-and-a-half years -- solely
on the basis of an ancient inline comment.  In that time no one has
produced any evidence that we are doing the wrong thing.  Given how many
of our developers are currently working on AMD64, I would have expected
that by now some evidence of doing the wrong thing would have emerged.

I am therefore taking this ticket, removing the inline comment from
config/init/defaults.pm and resolving the ticket.  Wayland, if you get
around to testing the install paths on 64-bit and we're doing the wrong
thing, please open up a Trac ticket with full details.

Thank you very much.
kid51