SilcBool silc_http_server_add_header(SilcHttpServer httpd,
                                         SilcHttpConnection conn,
                                         const char *field,
                                         const char *value);

    Adds a new header to the HTTP headers to be sent back to the
    HTTP client.  This may be called to add needed headers to the
    HTTP reply.

    silc_http_server_add_header(httpd, conn, "Content-Type", "image/jpeg");
    silc_http_server_send(httpd, conn, image_data);