Add vcs revision to version string

package version

import "fmt"

import "runtime/debug"

var version = func() string {

	ver := "2.8.1"

	if info, ok := debug.ReadBuildInfo(); ok {

		for _, setting := range info.Settings {

			if setting.Key == "vcs.revision" {

				return fmt.Sprintf("%v (%v)", ver, setting.Value[:8])

			}

		}

	}

	return ver

}()

func GetVersion() string {

	return version

}

var version = "2.8.1"