Tunnel: ifconfig are outdated

[marek22k]

Hello,

ifconfig is obsolete on Linux and should be replaced by ip. On some Linux distributions, ifconfig is no longer (pre)installed.

$ sudo meshtastic --tunnel
Connected to radio
INFO file:tunnel.py __init__ line:83 Starting IP to mesh tunnel (you must be root for this *pre-alpha* feature to work).  Mesh members:
INFO file:tunnel.py __init__ line:95 Node !5687b499 has IP address None.180.153
INFO file:tunnel.py __init__ line:95 Node !148bfdc5 has IP address None.253.197
sh: line 1: ifconfig: command not found
Aborting due to: