IPv6 ICMP probing support

[valeriansaliou]

Due to the replacement of fastping-rs with ping, ICMPv6 support might have been dropped on some platforms.

A fork of the unmaintained ping library, and a full rework into a cleaner library would be much needed, adding support for ICMP IPv6 on all platforms.

[Toommi]

I am wondering under which platforms ipv6 is supported. Even with the Docker Image it is not working.

[valeriansaliou]

It only applies to macOS platforms. The Docker image user does not have permissions to send ICMP packets from non-privileged UNIX users at the kernel level, this is normal, so ICMP will not work at all under Docker.

[williamdes]

I can confirm that IPv6 works outside of Docker on Debian 12.
Maybe #148 can fix this ?