Mirror

[logicog]

This adds a "mirror status" and "mirror off" cli command.
It also adds configuration support for mirroring through the web-interface.

> mirror 1 2 3r 4t
port_mirror_set called 
Mirroring port: 04 with rx-mask: 0x0060, tx mask: 0x00a0

> mirror status
Enabled: Mirroring port: 1, Port mask RX: 0x0060, Port mask TX: 0x00a0

> mirror off
port_mirror_del called 

> mirror status
NOT Enabled: Mirroring port: 0, Port mask RX: 0x0060, Port mask TX: 0x00a0

> mirror 2 3 4
port_mirror_set called 
Mirroring port: 05 with rx-mask: 0x00c0, tx mask: 0x00c0

> mirror status
Enabled: Mirroring port: 2, Port mask RX: 0x00c0, Port mask TX: 0x00c0