Add DualMode support for Endpoints to listen on IPv4 and IPv6 at the same time

[Badgerati]

Description of the Change

Adds a new -DualMode switch on Add-PodeEndpoint, to enable support for listening on both IPv4 and IPv6 for an -Address (if IPv6 is supported).

Related Issue

Resolves #1251

Examples

Add-PodeEndpoint -Address * -Port 8080 -Protocol Http -DualMode

[mdaneri]

You hit the issue with 7.4.1 on Windows

[Badgerati]

@mdaneri What issue's that? 👀

[mdaneri]

The issue is that on Windows with pwsh 7.4.x, without any apparent reason, the endpoint refuses any incoming connection.

If you go back to 7.3.x or you are using Linux or Mac, the problem never manifests itself

[mdaneri]

I forgot to mention that when the test fails, it always happens with the restful test

[Badgerati]

Interesting, I do have 7.4.1 locally and only tend to see it happen in a GitHub; I'll have to run it several times locally see if I can get it to trigger 🤔

[mdaneri]

My Windows is virtual and fails almost every time

[mdaneri]

I think I found the source of the trouble
Invoke-RestMethod If I replace the cmdlet with curl.exe, everything works super fast without any problem.

Looks like the Invoke-RestMethod needs some work
we can modify the test to use curl instead of invoke
to capture the codes we can use curl -s -o /dev/null -w "%{http_code}" "$Endpoint/eek" -k

[mdaneri]

@Badgerati I "fixed" the restful HTTPS test with 7.4.x
the fix is committed to Migration to Pester 5.5 #1262
Please merge #1262 before your 1267, and should solve your test issue