Support multiple Set-Cookie headers as described in RFC 6265

[sebastian-philipp]

Hi,

from RFC-6265 3. Overview:

1. Overview

[...] An origin server can include multiple
Set-Cookie header fields in a single response. [...]

Origin servers SHOULD NOT fold multiple Set-Cookie header fields into
a single header field. The usual mechanism for folding HTTP headers
fields (i.e., as defined in [RFC2616]) might change the semantics of
the Set-Cookie header field because the %x2C (",") character is used
by Set-Cookie in a way that conflicts with such folding.

It looks like the current THeaderHash implementation cannot cope with multiple Set-Cookie headers at the moment.

Sebastian