(1) Request with a conflicting 'cuid'

  Header: PUT (Code=0.03)
  Uri-Path: ".well-known"
  Uri-Path: "dots"
  Uri-Path: "mitigate"
  Uri-Path: "cuid=dz6pHjaADkaFTbjr0JGBpw"
  Uri-Path: "mid=12"

  (2) Message body of the 4.09 (Conflict) response
      from the DOTS server

  {
    "ietf-dots-signal-channel:mitigation-scope": {
       "scope": [
          {
            "conflict-information": {
              "conflict-cause": "cuid-collision"
             }
          }
        ]
     }
  }

  (3) Request with a new 'cuid'

  Header: PUT (Code=0.03)
  Uri-Path: ".well-known"
  Uri-Path: "dots"
  Uri-Path: "mitigate"
  Uri-Path: "cuid=f30d281ce6b64fc5a0b91e"
  Uri-Path: "mid=12"