[Openid-specs-fapi] Issue #653: Add MTLS and DPoP etc. to 4. Abbreviations (openid/fapi)

[Nat]

New issue 653: Add MTLS and DPoP etc. to 4. Abbreviations
https://bitbucket.org/openid/fapi/issues/653/add-mtls-and-dpop-etc-to-4-abbreviations

Nat Sakimura:

Also, make sure other abbreviations are recorded there. 

* OAuth
* MTLS
* DPoP
* JWKS
* CSRF
* QR code
* FAPI

A good question is what to do with “FAPI”.