Renaming SSL3_MT_NEWSESSION_TICKET to SSL3_MT_NEW_SESSION_TICKET.

This keeps the naming convention in line with the actual spec.

Change-Id: I34673f78dbc29c1659b4da0e49677ebe9b79636b
Reviewed-on: https://boringssl-review.googlesource.com/8090
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/include/openssl/ssl3.h b/include/openssl/ssl3.h
index e5f9a89..64e1d31 100644
--- a/include/openssl/ssl3.h
+++ b/include/openssl/ssl3.h
@@ -395,7 +395,7 @@
 #define SSL3_MT_HELLO_REQUEST 0
 #define SSL3_MT_CLIENT_HELLO 1
 #define SSL3_MT_SERVER_HELLO 2
-#define SSL3_MT_NEWSESSION_TICKET 4
+#define SSL3_MT_NEW_SESSION_TICKET 4
 #define SSL3_MT_CERTIFICATE 11
 #define SSL3_MT_SERVER_KEY_EXCHANGE 12
 #define SSL3_MT_CERTIFICATE_REQUEST 13
@@ -409,6 +409,10 @@
 #define SSL3_MT_CHANNEL_ID_ENCRYPTED_EXTENSIONS 203
 #define DTLS1_MT_HELLO_VERIFY_REQUEST 3
 
+/* SSL3_MT_NEWSESSION_TICKET is a legacy alias for |SSL3_MT_NEW_SESSION_TICKET|
+ * for consumers which use |SSL_CTX_set_msg_callback|. */
+#define SSL3_MT_NEWSESSION_TICKET SSL3_MT_NEW_SESSION_TICKET
+
 
 #define SSL3_MT_CCS 1