ip: add support of 'ip link type [ipip|sit]'

This patch allows to manage ip tunnels via the interface ip link.
The syntax for parameters is the same that 'ip tunnel'.

It also allows to display tunnels parameters with 'ip -details link' or
'ip -details monitor link'.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
3 files changed