Add note mentioning IIS.Compression

[matbech]

You may want to add a note that Microsoft has released a new module now which also supports Brotli:
https://github.com/Microsoft/IIS.Compression

[saucecontrol]

Oh wow, I didn't know they finally made one. Since that one doesn't have the MSVC intrinsics change I added to mine, it will be slower. It's also interesting that they're using stock zlib rather than the faster Intel updated version included in .NET Core.

I'll see what I can do about getting those improvements added to the official one.

[matbech]

The zlib Intel version is broken and I'm not sure if the issue was fixed in the meanwhile:
intel/zlib#21

I do appreciate your efforts to get the MSVC intrinsics into the brotli upstream:
google/brotli#636

[saucecontrol]

Do you have any more info on that zlib issue? Microsoft is using that version in current builds of .NET Core, so it would be good to know if that's a reproducible problem.

[saucecontrol]

Finally got around to updating the readme