Registration 3.1, Messages 4.1 - Elements that are lists should be JSON arrays

[Michael Jones]

The registration spec contains a number of space-separated lists. These will be easier to parse and use if represented as JSON array elements.

I propose that we change the types of these members from space-separated lists to arrays. I also propose to change the names as follows:

contact -> contacts

redirect_uri -> redirect_uris

js_origin_uri -> origin_uris

userinfo_require_encrypted_response -> userinfo_encrypted_response_algs

userinfo_require_signed_response -> userinfo_signed_response_algs

id_token_require_encrypted_response -> id_token_encrypted_response_algs

id_token_require_signed_response -> id_token_signed_response_algs

[Michael Jones]

These are form-encoded and so can not be JSON arrays.