support unix socket fix #151

You can set
HttpAddr="/tmp/beego.sock"
HttpPort=0

beego.go

@@ -98,7 +98,11 @@ func NewApp() *App {
 }
 
 func (app *App) Run() {
-	addr := fmt.Sprintf("%s:%d", HttpAddr, HttpPort)
+	addr := HttpAddr
+
+	if HttpPort != 0 {
+		addr = fmt.Sprintf("%s:%d", HttpAddr, HttpPort)
+	}
 	var (
 		err error
 		l   net.Listener
@@ -134,7 +138,6 @@ func (app *App) Run() {
 			}
 			err = s.ListenAndServe()
 		}
-
 	}
 	if err != nil {
 		BeeLogger.Fatal("ListenAndServe: ", err)