DNS/実装/KnotDNSresolver/libknotについて、ここに記述してください。

https://github.com/craftext/Knot-DNS/blob/master/src/libknot/

https://github.com/craftext/Knot-DNS/blob/master/src/libknot/edns.c

config: add option for maximal udp payload 
https://gitlab.labs.nic.cz/labs/knot/commit/c1500105faba6e3e8d5c4f89085bf281b4189512

+max-udp-payload { lval.t = yytext; return MAX_UDP_PAYLOAD; }

"bufsize must be within <1220, 65535>" という制限もあるようだ。（なぜ）

== Knot DNS configuration ==
https://www.knot-dns.cz/docs/1.6/html/reference.html

-- ToshinoriMaeno <<DateTime(2016-02-08T01:08:20+0900)>>