net: support ALPN.

net/third_party/nss/ssl/sslt.h

 /*
  * This file contains prototypes for the public SSL functions.
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /* $Id$ */
 
 #ifndef __sslt_h_
 #define __sslt_h_
@@ skipping 178 matching lines @@
 /* Update SSL_MAX_EXTENSIONS whenever a new extension type is added. */
 typedef enum {
     ssl_server_name_xtn              = 0,
     ssl_cert_status_xtn              = 5,
 #ifdef NSS_ENABLE_ECC
     ssl_elliptic_curves_xtn          = 10,
     ssl_ec_point_formats_xtn         = 11,
 #endif
     ssl_signature_algorithms_xtn     = 13,
     ssl_use_srtp_xtn                 = 14,
+    ssl_application_layer_protocol   = 16,

[wtc, 2013/08/01 19:35:24]

The enum for ALPN should also end in _xtn like the other enums.
This requires abbreviation to keep the enum name short, for example,
ssl_app_layer_proto_nego_xtn.

     ssl_session_ticket_xtn           = 35,
     ssl_next_proto_nego_xtn          = 13172,
     ssl_channel_id_xtn               = 30031,
     ssl_renegotiation_info_xtn       = 0xff01   /* experimental number */
 } SSLExtensionType;
 
-#define SSL_MAX_EXTENSIONS             10
+#define SSL_MAX_EXTENSIONS             11
 
 #endif /* __sslt_h_ */