ip: Allow to easy change network namespace

Added new '-netns' option to simplify executing following cmd:

    ip netns exec NETNS ip OPTIONS COMMAND OBJECT

    to

    ip -n[etns] NETNS OPTIONS COMMAND OBJECT

e.g.:

    ip -net vnet0 link add br0 type bridge
    ip -n vnet0 link

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
2 files changed