dns/powerdns-recursor: Security update 5.4.2 => 5.4.3

Port changes:

• Add NOD option for upstream new feature support
• Set C++17 standard
• Use '+=' instead of '=' for DISTFILES to reduce portlint warnings

Changelog:
https://doc.powerdns.com/recursor/changelog/5.4.html#change-5.4.3
Security Advisory:
https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-08.html

PR: 296313
Reported by: Jordan Ostreff <jordan@ostreff.info>
Approved by: osa, vvd (Mentors, implicit)
MFH: 2026Q2
Security: CVE-2026-3361
Security: CVE-2026-40012
Security: CVE-2026-42005
Security: CVE-2026-42387
Security: CVE-2026-42388
Security: CVE-2026-42389
Security: CVE-2026-42390
Security: CVE-2026-52690

(cherry picked from commit 82534ef917657af7d32031669a67da015950d9b9)