Fix bug of DisableGravatar default value (#22297)

backport #22296

Co-authored-by: KN4CK3R <admin@oldschoolhack.me>

models/system/setting.go

@@ -267,7 +267,7 @@ func Init() error {
 		enableFederatedAvatar = false
 	}
 
-	if disableGravatar || !enableFederatedAvatar {
+	if enableFederatedAvatar || !disableGravatar {
 		var err error
 		GravatarSourceURL, err = url.Parse(setting.GravatarSource)
 		if err != nil {

modules/setting/picture.go

@@ -69,7 +69,7 @@ func newPictureService() {
 }
 
 func GetDefaultDisableGravatar() bool {
-	return !OfflineMode
+	return OfflineMode
 }
 
 func GetDefaultEnableFederatedAvatar(disableGravatar bool) bool {