update version format

Makefile

@@ -2,9 +2,8 @@ NAME=tun2socks
 BUILDDIR=$(shell pwd)/build
 CMDDIR=$(shell pwd)/cmd/tun2socks
 VERSION=$(shell git describe --tags --long || echo "unknown version")
-BUILDTIME=$(shell date -u)
 BUILD_TAGS='socks fakedns d stats'
-BUILD_LDFLAGS='-s -w -X "main.version=$(VERSION)"  -X "main.buildTime=$(BUILDTIME)"'
+BUILD_LDFLAGS='-s -w -X "main.version=$(VERSION)"'
 GOBUILD=go build -ldflags $(BUILD_LDFLAGS) -v -tags $(BUILD_TAGS)
 
 all: build

cmd/tun2socks/main.go

@@ -22,8 +22,8 @@ import (
 const MTU = 1500
 
 var (
-	version   = "unknown version"
-	buildTime = "unknown time"
+	version     = "unknown version"
+	description = "A tun2socks implementation written in Go."
 
 	args            = new(CmdArgs)
 	postFlagsInitFn = make([]func(), 0)
@@ -65,7 +65,8 @@ func registerHandlerCreator(name string, creator func()) {
 }
 
 func showVersion() {
-	fmt.Println("tun2socks", version, buildTime)
+	fmt.Println("Go-tun2socks", version)
+	fmt.Println(description)
 }
 
 func main() {