i18n stuff

[sftcd]

This is just a holding issue to check we have no i18n issues with e.g. names as we transit between JSON and DNS RR values.

[bemasc]

I think the SvcParams are covered by the reference to isomorphic decode:

wkesni/draft-ietf-tls-wkech.xml

Line 421 in c2850b0

so each value octet is stored as a single Unicode codepoint

The TargetName currently doesn't have this text though, which leaves some ambiguity about what to do with TargetNames like "asdf.☃.example.com".

[davidben]

For asdf.☃.example.com, is it not sufficient to just say that the target names are A-labels. (Or U-labels, whichever is easier for the zone factory. I'm guessing A-labels will be easier?)

[bemasc]

Yep, something like that would be fine.

EDIT: Note that A-label names are a subset of all DNS names, because DNS labels are formally 8-bit-clean octet sequences. So either we restrict TargetName to be an ASCII-compatible subset of DNS names, or we need to apply something like isomorphic decode.