## Link to GitHub Issue or related Pull Request, if one exists
#911
## Description of change
Add tunnelhost/tunnelclient modes to -nicspoof so two cabs can do
LAN-style BPL matching over a real UDP path (including Wine), while
keeping the fake overlay NIC. Offline spoof remains available as before.
## Testing
DDR
## Link to GitHub Issue or related Pull Request, if one exists
#0
## Description of change
Spoof a valid NIC, so games can use a local server completely offline.
Previously this was impossible on macOS wine, or it required km-test
loopback adapter on Windows.
## Testing
Tested DDR (32bit/64bit) and SDVX on Windows 10 and macOS Tahoe.
Enabling -nicspoof and -icmphook connects to airgapped 127.0.0.1.