Support for OpenBSD

[ch9PcB]

Hello

It would be wonderful if vpnfailsafe.sh could be made to work on OpenBSD.

Thanks in advance for your time and effort.

[Wojciech Knapik]

This seems very unlikely to ever be implemented. Too much Linux-specific stuff. Closing, sorry.

[Daniel Nathan Gray]

Might be worth considering this port https://github.com/giovanifss/vpnfailsafe-openbsd