Merge the server-side support of ALPN from the NSS upstream.

net/third_party/nss/ssl/ssl3prot.h

 /* Private header file of libSSL.
  * Various and sundry protocol constants. DON'T CHANGE THESE. These
  * values are defined by the SSL 3.0 protocol specification.
  *
  * 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/. */
 
 #ifndef __ssl3proto_h_
 #define __ssl3proto_h_
@@ skipping 89 matching lines @@
     internal_error          = 80,
     inappropriate_fallback  = 86,       /* could also be sent for SSLv3 */
     user_canceled           = 90,
     no_renegotiation        = 100,
 
 /* Alerts for client hello extensions */
     unsupported_extension           = 110,
     certificate_unobtainable        = 111,
     unrecognized_name               = 112,
     bad_certificate_status_response = 113,
-    bad_certificate_hash_value      = 114
+    bad_certificate_hash_value      = 114,
+    no_application_protocol         = 120
 
 } SSL3AlertDescription;
 
 typedef struct {
     SSL3AlertLevel       level;
     SSL3AlertDescription description;
 } SSL3Alert;
 
 typedef enum {
     hello_request       = 0, 
@@ skipping 234 matching lines @@
     unsigned char *iv;
     SECItem encrypted_state;
     unsigned char *mac;
 } EncryptedSessionTicket;
 
 #define TLS_EX_SESS_TICKET_MAC_LENGTH       32
 
 #define TLS_STE_NO_SERVER_NAME        -1
 
 #endif /* __ssl3proto_h_ */