v3 Onion Services: Put IPv6 and unrecognised link specifiers in onion service EXTEND cells
Prop224 says:
The hidden service SHOULD NOT reject any LSTYPE fields which it
doesn't recognize; instead, it should use them verbatim in its EXTEND
request to the rendezvous point.https://gitweb.torproject.org/torspec.git/tree/proposals/224-rend-spec-ng.txt#n1689
We should either remove this from the spec, or we should:
- add a similar sentence for client descriptor lspecs
- put unrecognised lspecs in descriptors in client intro EXTEND requests
- put unrecognised lspecs in INTRODUCE cells in service rend EXTEND requests