net.connect: Mention RFC 6724 regression

Default Address Selection algorithm is not applied, resulting in a
strong bias towards IPv4.

net/resolvers/basic.lua

@@ -8,6 +8,7 @@ local methods = {};
 local resolver_mt = { __index = methods };
 
 -- TODO Respect use_ipv4, use_ipv6
+-- FIXME RFC 6724
 -- FIXME #1428 Reuse DNS resolver object (from service resolver)
 -- FIXME #1429 Close DNS resolver object when done