801.11 monitor mode for OSX

[guedou]

This should fix #1161.

Here is how to use it:

$ cat test_sniff.py 
from scapy.all import *

s = sniff(count=1, timeout=1, monitor=True)
if len(s):
    s.nsummary()
$ sudo python test_sniff.py 
0000 RadioTap / 802.11 Data 4 92:84:b0:7b:0d:da > b4:52:7d:41:be:96 / LLC / Raw

[codecov-io]

Codecov Report

Merging #1215 into master will increase coverage by 0.93%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master    #1215      +/-   ##
==========================================
+ Coverage    84.8%   85.74%   +0.93%     
==========================================
  Files         159      160       +1     
  Lines       38247    40775    +2528     
==========================================
+ Hits        32434    34961    +2527     
- Misses       5813     5814       +1

Impacted Files	Coverage Δ
scapy/arch/bpf/consts.py	100% <100%> (ø)	⬆️
scapy/arch/bpf/supersocket.py	76.38% <37.5%> (-1.71%)	⬇️
scapy/layers/llmnr.py	96.66% <0%> (-3.34%)	⬇️
scapy/layers/tls/keyexchange.py	82.64% <0%> (-2.12%)	⬇️
scapy/layers/tls/record_sslv2.py	87.15% <0%> (-1.68%)	⬇️
scapy/layers/tls/record.py	91.2% <0%> (-0.88%)	⬇️
scapy/layers/inet.py	69.22% <0%> (-0.7%)	⬇️
scapy/layers/tls/basefields.py	79.59% <0%> (-0.69%)	⬇️
scapy/layers/snmp.py	87.8% <0%> (-0.53%)	⬇️
scapy/asn1/ber.py	82% <0%> (-0.29%)	⬇️
... and 18 more

[gpotter2]

Sounds ready to merge :)