4401. [misc] Change LICENSE to MPL 2.0.
4015. [bug] Nameservers that are skipped due to them being CNAMEs were not being logged. They are now logged to category 'cname' as per BIND 8. [RT #37935]
3949. [experimental] Experimental support for draft-andrews-edns1 by sending EDNS(1) queries (define DRAFT_ANDREWS_EDNS1 when building). Add support for limiting the EDNS version advertised to servers: server { edns-version 0; }; Log the EDNS version received in the query log. [RT #35864]
update copyright notice
3703. [func] Prefetch about to expire records if they are queried for, see prefetch option for details. [RT #35041]
3282. [bug] Restrict the TTL of NS RRset to no more than that of the old NS RRset when replacing it. [RT #27792]