databases/ruby-bdb uses WITH_BDB6_PERMITTED

From: Fernando_ApesteguĂ­a <fernape_at_freebsd.org>
Date: Thu, 06 Feb 2025 12:35:53 UTC
Hi there ruby maintainers!

I'm in the process of updating the Uses=bdb section in the Porter's
Handbook.
While having a look at Mk/Uses/bdb.mk and inspecting the ports tree, I saw
that databases/ruby-bdb is the only port using the WITH_BDB6_PERMITTED hack.
Why is that? Would it be possible to update the port to Uses=bdb:5 or
Uses=bdb:18?

Cheers!