Separate encrypted lookup path entirely

[masih]

The double hash multicodec code is not dedicated to encrypted records. Therefore we cannot implicitly assume that it represents one.

Separate encrypted lookup path by adding /encrypted prefix.

Context:

• IPIP-0421: HTTP Delegated Routing Reader Privacy Upgrade ipfs/specs#421 (comment)

[gammazero]

Does this only apply to the delegatedTranslator at the /routing/v1/ path, or does this apply to all queries (/cid/, /multihash/, etc.)?

[masih]

All queries.

For HTTP delegated routing, the semantics are not finalised though close to be.
For IPNI we should separate, encrypted queries from non encrypted and remove implicit assuptions that the multicodec would be of kind double hash.