[Openid-specs-ab] Issue #1735: iss in JWT PoP should be optional (openid/connect)

[Tobias Looker]

New issue 1735: iss in JWT PoP should be optional
https://bitbucket.org/openid/connect/issues/1735/iss-in-jwt-pop-should-be-optional

Tobias Looker:

With the allowance of an anon client in the pre-authorization grant type, the iss value being required and having to be set to the client\_id does not make sense, instead I suggest we make this claim optional for such a case.