procedure SendRawCustomContent(const Content: AnsiString; const
      ContentType: String; const ContentEncoding: String=''; const
      ContentDisposition: String='')

procedure SendRawCustomContent(const Content: TBytes; const
      ContentType: String; const ContentEncoding: String=''; const
      ContentDisposition: String='')

Sends a raw (AnsiString) text response with a custom content type, encoding, and disposition.