Test UDP and TCP separately for IPv6

[mgkuhn]

It would be useful to see test results displayed for both TCP and UDP separately for both IPv4 and IPv6. Oddly configured firewalls or VPNs may treat either TCP or UDP differently for IPv4 and IPv6, and the current single "IPv6 enabled" test does not indicate on failure whether UDP or TCP or both failed.

I get

Udp enabled = yes
Tcp enabled = yes
Ipv6 enabled = false

even though my browser runs on a dual-stack machine and has IPv6 TCP connectivity. Was Ipv6 only tested with UDP? The result does not say.

Expected results The Network test section should display the outcome of four tests: UDP over IPv4 enabled TCP over IPv4 enabled UDP over IPv6 enabled TCP over IPv6 enabled

Actual results Currently it shows only the outcome of three tests: UDP enabled TCP enabled IPv6 enabled

[perkelix]

Same issue here: dual-stack host, and yet I get "[ WARN ] Failed to gather IPv6 candidates, it might not be setup/supported on the network."