Feature request: EDNS EXPIRE (RFC 7314)
Hi. Long chains of XFR servers can lead to a situation where a zone's expiry is extended well beyond what's in the SOA record. We have recently had this situation with some of our zones, where the secondary kept serving a zone with expired RRSIGs.
Would you consider implementing RFC 7314 in Knot DNS, both when providing XFR as well as requesting XFR, and honouring the expiry from the EDNS EXPIRE option instead of the SOA record?