Enhance "uriabsolute" validation

[angrycuban13]

Hello,

I started using PSFramework for a module I am writing, and I noticed an interesting "bug" (if you could call it that) - if you try to set one of your config settings as follows:

Set-PSFConfig -Module MyModule -Name URL -Value 'xy://' -Validation uriabsolute

It will still return $true because the validation scriptblock is only looking at IsAbsoluteUri and I guess the [uri] class in Powershell is quite permissive and uses :// as the separator so anything specified before that is treated as "correct".

I know I could write my own custom validation, but I did want to bring this up to your attention. Some potential fixes I can think of are:

• Creating a Scheme allowlist of some sort for common URIs such as http, https, ftp, wss, etc.
• Checking that Host is not empty

Just throwing some ideas out there, thank you for the great module!