Path should be unescaped

[lodejard]

Not sure if kestrel is doing this yet, but the path portion (not the query portion) of the request line should be unescaped.

[troydai]

I'm validating current Kestrel behavior

[troydai]

Looks like an issue:

send:

http://localhost:5000/path(%201)/path2?key=value%202&key2=value2

kestrel:

GET /path(%25201)/path2?key=value%202&key2=value2

[Tratcher]

Compare to weblistener. We should also check what happens when behind IIS.

[troydai]

To: @Tratcher @lodejard @halter73 @blowdart

Note:

• I'll add the logic to https://github.com/aspnet/HttpAbstractions/tree/dev/src/Microsoft.Extensions.WebEncoders.Core so as to able to share the path decoding loigc
• Different from Http.Sys, %2F will not be unescaped so as not to alter the meaning of an Url path.