This enables an ssl server the option to communicate with both verified and unverified peers with the same listener.
Supporting API calls...
ssl-peer-verified? -> returns #t if an ssl-port's peer has presented a valid and verified certificate
ssl-peer-subject-name -> returns the subject field of the certificate presented by an ssl-port's peer
ssl-peer-issuer-name -> returns the issuer field of the certificate presented by an ssl-port's peer