Commented Issue: [CORS] Preflight request failed when there's an HttpOptions route attribute [1050]

This is reported by a customer. See more details here: https://aspnetwebstack.codeplex.com/discussions/441725#editor
Repro attached.
Comments: Hi Yao, Just installed today's build. I'm only successful if I keep the HttpOptions attribute on the method. ``` [HttpGet("{id}/feed")] [HttpOptions("{id}/feed")] [EnableCors("*", "*", "*", SupportsCredentials = true)] public async Task<HttpResponseMessage> GetFeed(string id) ``` Shouldn't I be able to remove the HttpOptions attribute and have CORS handle the preflight OPTIONS on its own? Thanks, Bruno