For now both winpcap and npcap are supported with the latter being
experimentally supported till we get some feedback from users and
confirm that things are all working fine with npcap.
OID for link state has been changed to one that supports both.
To check which is being used, run 'drone -v'.
Fixes#236
... instead of the PCAP returned description. This allows for a better
UX since user can more easily identify which port is which.
This will work only Windows Vista and higher since IPHLPAPI.DLL has
published APIs only for these versions. Older windows versions such as
XP will continue to use the PCAP returned description
Fixes#222
bps stats are derived from the Bps stats and represent line rate taking
into account the per packet overhead on the line with the following
assumptions -
* Link type is Ethernet
* Bps (and total Bytes) stats don't include the 4-byte FCS
Fixes#241
