Add/Modify Url Encoding/Decoding for IIS UrlRewrite

[jkotalik]

I didn't implement UrlDecode, a server variable in IISUrlRewrite, because there wasn't a great library (or static method) to do it. Right now I'm using Uri.Encode for encoding, which doesn't have the best perf.

I think we can use Uri.EscapeDataString, but fundamentally I think this should be changed to a different library.

[vchy1997]

Hello
This is my first request, so please forgive me if there are any shortcomings.
I have read the code and the documentation.

The methods that I think need to be used.

1. System.Uri.EscapeUriString("");
2. System.Uri.UnescapeDataString("");

What I think needs to be changed.

1. src\Middleware\Rewrite\src\UrlEncodeSegment.cs [Modify]
2. src\Middleware\Rewrite\src\PatternSegments\UrlDecodeSegment.cs [ADD]
3. src\Middleware\Rewrite\src\IISUrlRewrite\InputParser.cs (case UrlDecode/UrlEncode) [Modify]
4. src\Middleware\Rewrite\test\IISUrlRewrite\InputParserTests.cs [Modify]

If there is no problem, I think I can modify it

Thanks 😄