proposed MIB

### AP Config
* OID: __1.3.6.1.4.1.2076.81.2.2.1.26__
* type: string
* command format: `<ap enabled> <fec supported> <fec required> <flow control enabled>`
* _ap enabled_ options:
- `0`: disabled
- `1`: enabled
- `-1`: this port doesn't support 802.3ap -- readonly
* _FEC supported_ options:
- `0`: disabled
- `1`: FC FEC
- `2`: RS FEC
- `3`: BOTH FEC
- `4`: RS FEC 544
* _FEC required_ options:
- `0`: disabled
- `1`: FC FEC
- `2`: RS FEC
- `3`: BOTH FEC
- `4`: RS FEC 544
* _flow control enabled_ options:
- `0`: disabled
- `1`: enabled
* examples

# disable port 3's 802.3AP function
snmpset -c NETMAN localhost 1.3.6.1.4.1.2076.81.2.2.1.26.3 s "0" 

# set port 3's 802.3AP configuration
snmpset -c NETMAN localhost 1.3.6.1.4.1.2076.81.2.2.1.26.3 s "1 3 3 0"

# get port 2's 802.3AP configuration
snmpget -c NETMAN localhost 1.3.6.1.4.1.2076.81.2.2.1.26.2 
iso.3.6.1.4.1.2076.81.2.2.1.26.2 = STRING: "1 2 2 0"

### AP status
* OID: __1.3.6.1.4.1.2076.81.2.2.1.27__
* type: string
* return string format: `<negotiation succeed> <fec enabled> <negotiated fec type> <RX FC enabled> <TX FC enabled>`
* _negotiation succeed_:
- `0`: no
- `1`: yes
- `-1`: this port doesn't support 802.3ap
* _fec enabled_:
- `0`: no
- `1`: yes
- `-1`: this port doesn't support 802.3ap
* _negotiated fec type_:
- `0`: none
- `1`: FC FEC
- `2`: RS FEC
- `3`: RS FEC 544
- for ports not supporting 802.3ap, this field has no meaning
* _RX FC enabled_:
- `0`: no
- `1`: yes
- for ports not supporting 802.3ap, this field has no meaning
* _TX FC enabled_:
- `0`: no
- `1`: yes
- for ports not supporting 802.3ap, this field has no meaning

#get port 2's 802.3AP status
snmpget -c NETMAN localhost 1.3.6.1.4.1.2076.81.2.2.1.27.2
iso.1.3.6.1.4.1.2076.81.1.129.2 = STRING: "1 1 2 0 0"

#get port 17's 802.3AP status and according the result it doesn't support 802.3ap at all
snmpget -c NETMAN localhost 1.3.6.1.4.1.2076.81.2.2.1.27.17
iso.1.3.6.1.4.1.2076.81.1.129.2 = STRING: "-1 -1 0 0 0"

## reference implementation
With UI spec, using port 2 as example
* `none`: just disable 802.3AP

snmpset -c NETMAN localhost 1.3.6.1.4.1.2076.81.2.2.1.26.2 s "0"

* `auto`: supports both fec mode and doesn't require peer's FEC mode.

snmpset -c NETMAN localhost 1.3.6.1.4.1.2076.81.2.2.1.26.2 s "1 3 0 0" 

* `RS FEC`:

snmpset -c NETMAN localhost 1.3.6.1.4.1.2076.81.2.2.1.26.2 s "1 3 2 0"

* `FC FEC`:

snmpset -c NETMAN localhost 1.3.6.1.4.1.2076.81.2.2.1.26.s s "1 3 1 0"