Tagged date is that of the commit, not build

cmd/syncthing/main.go

@@ -41,7 +41,7 @@ func init() {
 	stamp, _ := strconv.Atoi(BuildStamp)
 	BuildDate = time.Unix(int64(stamp), 0)
 
-	date := BuildDate.UTC().Format(time.RFC3339)
+	date := BuildDate.UTC().Format("2006-01-02 15:04:05 MST")
 	LongVersion = fmt.Sprintf("syncthing %s (%s %s-%s) %s@%s %s", Version, runtime.Version(), runtime.GOOS, runtime.GOARCH, BuildUser, BuildHost, date)
 }