add force encrypt settings

src/server/settings/torrbt.go

@@ -17,6 +17,7 @@ type BTSets struct {
 	ContentPath string // path to save content
 
 	// Torrent
+	ForceEncrypt             bool
 	RetrackersMode           int  // 0 - don`t add, 1 - add retrackers (def), 2 - remove retrackers 3 - replace retrackers
 	TorrentDisconnectTimeout int  // in seconds
 	EnableDebug              bool // print logs

src/server/torr/btserver.go

@@ -87,7 +87,7 @@ func (bt *BTServer) configure() {
 
 	// Encryption/Obfuscation
 	bt.config.HeaderObfuscationPolicy = torrent.HeaderObfuscationPolicy{
-		RequirePreferred: false,
+		RequirePreferred: settings.BTsets.ForceEncrypt,
 		Preferred:        true,
 	}