receives data from multiple formats

however, data structure is variable; this makes templates unnecessary
complex. It would be better to convert everything to rfc5424 (at some
point)

cmd/circologd/main.go

@@ -43,7 +43,7 @@ func main() {
 	go hub.Run()
 
 	server := syslog.NewServer()
-	server.SetFormat(syslog.RFC5424)
+	server.SetFormat(syslog.Automatic)
 	server.SetHandler(handler)
 	if *syslogSocketPath != "" {
 		if err = server.ListenUnixgram(*syslogSocketPath); err != nil {