DNS-over-TLS forwarding to custom NextDNS fails due to (apparent) lack of SNI in knot-resolver

[vcunat]

Turris OS 4.x contains an old version of Knot Resolver that didn’t send SNI yet. On 5.x it’s new enough (and on stable 3.x as well). https://forum.test.turris.cz/t/turris-os-5-0-0-is-released-in-hbt