Add OpenRTB 2.6 Regulation fields (#115)

openrtb.go

@@ -831,8 +831,10 @@ type Segment struct {
 // coppa flag signals whether or not the request falls under the United States Federal Trade Commission's
 // regulations for the United States Children's Online Privacy Protection Act ("COPPA").
 type Regulations struct {
-	COPPA int             `json:"coppa,omitempty"` // Flag indicating if this request is subject to the COPPA regulations established by the USA FTC, where 0 = no, 1 = yes.
-	Ext   json.RawMessage `json:"ext,omitempty"`
+	COPPA     int             `json:"coppa,omitempty"`      // Flag indicating if this request is subject to the COPPA regulations established by the USA FTC, where 0 = no, 1 = yes.
+	GDPR      int             `json:"gdpr,omitempty"`       // Flag that indicates whether or not the request is subject to GDPR regulations 0 = No, 1 = Yes, omission indicates Unknown.
+	USPrivacy string          `json:"us_privacy,omitempty"` // Communicates signals regarding consumer privacy under US privacy regulation.
+	Ext       json.RawMessage `json:"ext,omitempty"`
 }
 
 // Format object represents an allowed size (i.e., height and width combination) for a banner impression.