dns/dnsmasq-devel: update to 2.91test4.

Upstream Git history since our 2.91test3:

• 5ef6c8c 2024-12-30 | Extend fcb40ee73d04e1ffd46f8c19e537f118526f57ea to cover "Make install-i18n" (tag: v2.91test4, origin/master, origin/HEAD) [Simon Kelley]
• 7c348a0 2024-12-24 | Extend d578da0665c496ca709c25ae8d6963d1bff141c4 to Linux-only code. [Simon Kelley]
• d578da0 2024-12-24 | Fix FTBFS when using -pedantic compiler flag. [Matthias Andree]
• 8949ef4 2024-12-24 | Update DE translation. [Conrad Kostecki]

The patches I shipped in earlier 2.91test2/test3 have been integrated
upstream with d578da0 and are no longer needed.

Let's swap FreeBSD's distcache in first place because the upstream
master site is slow, let's relieve it a bit.