Extending webfinger response (issue:2851) (#3053)

* Extending webfinger response #2851
1. Added Logo
 - rel: avatar as there wasn't any appropriate value in [Link relations registry](https://www.iana.org/assignments/link-relations/)
 - type: default value image/png or else it is determined file type extension
2. Added Stream
 - rel: stream as there wasn't appropriate value in [Link relations registry](https://www.iana.org/assignments/link-relations/)
 - type: video/H264 based on [IANA media types](https://www.iana.org/assignments/media-types/media-types.xhtml#video)

Changes after review:

1. Updated the rel type for avatar based on webfinger rel.
2. Updated the rel type for stream link and href value that closely associates to it.

* adding period after comments

* updating typo

activitypub/apmodels/webfinger.go

@@ -26,7 +26,9 @@ type Link struct {
 // MakeWebfingerResponse will create a new Webfinger response.
 func MakeWebfingerResponse(account string, inbox string, host string) WebfingerResponse {
 	accountIRI := MakeLocalIRIForAccount(account)
-
+	streamIRI := MakeLocalIRIForStreamURL()
+	logoIRI := MakeLocalIRIforLogo()
+	logoType := GetLogoType()
 	return WebfingerResponse{
 		Subject: fmt.Sprintf("acct:%s@%s", account, host),
 		Aliases: []string{
@@ -43,6 +45,16 @@ func MakeWebfingerResponse(account string, inbox string, host string) WebfingerR
 				Type: "text/html",
 				Href: accountIRI.String(),
 			},
+			{
+				Rel:  "http://webfinger.net/rel/avatar",
+				Type: logoType,
+				Href: logoIRI.String(),
+			},
+			{
+				Rel:  "alternate",
+				Type: "application/x-mpegURL",
+				Href: streamIRI.String(),
+			},
 		},
 	}
 }