~增加单独指定dns劫持端口的功能(用于搭配第三方DNS服务)

scripts/menus/check_port.sh

@@ -8,7 +8,7 @@ check_port(){
 	elif [ -n "$(echo "|$mix_port|$redir_port|$dns_port|$db_port|" | grep "|$1|")" ]; then
 		echo -e "\033[31m输入错误！请不要输入重复的端口！\033[0m"
 		return 1
-	elif [ -n "$(netstat -ntul | grep ":$1 ")" ]; then
+	elif [ -n "$(netstat -ntul | grep -E ":$1[[:space:]]")" ]; then
 		echo -e "\033[31m当前端口已被其他进程占用，请重新输入！\033[0m"
 		return 1
 	else