I3status-rust: Show also IPv6

[svenstaro]

Currently, only the IPv4 is shown if available. I would also like to see the IPv6 if the interface has one.

[atheriel]

This sounds like a nice addition. Would you want it to show both? We could have a new configuration option along the lines of the following:

[[block]]
block = "net"
show_ip = "ipv4" # Default
show_ip = "ipv6" 
show_ip = "both"

[svenstaro]

I would have imagined it more like

[[block]]
block = "net"
show_ipv4 = "true" # Default
show_ipv6 = "true" 

And yes, I'd like it to show both.

[jedahan]

I'm wondering if net should be refactored to support templating instead of a ton of booleans?

[ammgws]

@jedahan That would be nice. Are you up for the challenge?

In the meantime I added ipv6 as another bool option via #647.