v1.0.4 — RFC 6265 cookie emission
BuildHeaders appends one 'Set-Cookie: ' line per Res.Cookie(...)/AddCookie entry to OutCustomHeaders (CRLF-joined, so multiple cookies are preserved); all attributes
incl. Max-Age round-trip. Adds Section K cookie tests and Section J wildcard SendFile tests (Delphi .dpr + Lazarus .lpr). Requires horse >=3.1.104.