tree ed26a5ef54bd621f5bf6fe06aa490995078e4673
parent 18917544879aa699281dfc45d9d8f5658f5ba283
author WANG Cong <xiyou.wangcong@gmail.com> 1396631240 -0700
committer Stephen Hemminger <stephen@networkplumber.org> 1397263497 -0700

ipaddress: do not add IFA_FLAGS when not necessary

commit 37c9b94ed21d5779acc23d89a4 (add support for extended ifa_flags)
introduced a regression:

        # ./ip/ip addr add 192.168.0.1/24 dev eth0
        RTNETLINK answers: Invalid argument

This is due to old kernels don't support IFA_FLAGS flag, we should not
use it if we don't use the flags beyond old .ifa_flags.

Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>