bac42x

Thank you @chimurai!

@chimurai, v0.17.4 fixed it for me! Thank you very much! I have been completely unsuccessful getting OWIN/Katana to handle CORS preflight after many hours of work. This is a lifesaver!

@Hammer82, I was only able to solve it by modifying the server. In my case, this meant intercepting the OPTIONS request in our OWIN WebApi service by using the HttpListener.AuthenticationSchemeSelectorDelegate....