anchor.diff:            "BlackList"
             "RequestOptions"
             "SendOption"
  +          "FallbackLeaseLifetimeSec"
  +          "Label"
  +          "Use6RD"
           ])
           (assertValueOneOf "UseDNS" boolValues)
           (assertValueOneOf "RoutesToDNS" boolValues)
  
positive.code:         (assertValueOneOf "WithoutRA" ["no" "solicit" "information-request"])
          (assertRange "SendOption" 1 65536)
          (assertInt "IAID")
        ];
  
        sectionDHCPPrefixDelegation = checkUnitConfig "DHCPPrefixDelegation" [
  
negative.code:           "User"
            "SuppressPrefixLength"
            "Type"
            "SuppressInterfaceGroup"
          ])
          (assertInt "TypeOfService")
          (assertRange "TypeOfService" 0 255)
  