Update only IPv6 prefix #764
Description
Inspirations:
- IPv6 - Fixed Suffix, Dynamic Prefix timothymiller/cloudflare-ddns#191
- https://www.reddit.com/r/networking/comments/121cr6p/ipv6_dynamic_dns
- https://www.reddit.com/r/PFSENSE/comments/emmz7l/dynamic_dns_with_address_substitution_using_ipv6/
Difficulties: how to decide suffixes when creating new DNS records?