dstufft/fenrir — pull request #1 by dstufft (2014-07-17 14:43:09+00:00)
Title: Per RFC 7230 Section 5.4 mandate that all requests contain a Host header

Technically the RFC only mandates the host header for HTTP/1.1 requests however due to the widespread adoption and the importance of the Host header for virtual hosting we'll mandate the header for HTTP/1.0 connections as well.