www/waterfox: native DNS HTTPS resolving

This enables the geckos to use the OS' resolver to resolve
DNS HTTPS RRs (see RFC 9460 https://www.rfc-editor.org/rfc/rfc9460
for specs on that)

PR: 295188
Sponsored by: UNIS Labs
MFH: 2026Q2

(cherry picked from commit c43948c764157afaebeb539389c279ba6d3b5128)