BUG/MINOR: h1: Don't test the host header during response parsing

During the H1 message parsing, the host header is tested to be sure it matches
the request's authority, if defined. When there are multiple host headers, we
also take care they are all the same. Of course, these tests must only be
performed on the requests. A host header in a response has no special meaning.

This patch must be backported to 2.1.
1 file changed