xinetd/xinetd_tests.sh: add IPv6 test for xinetd

If IPv6 is enabled, telnet ::1 will be tested. Otherwise, IPv4 only.
The IPv6 test will be executed first and give a separate result.

Signed-off-by: Xie Lingyun <lingyun.xie@bj.cs2c.com.cn>
Reviewed-by: Caspar Zhang <caspar@casparzhang.com>
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
1 file changed