Updating NewSessionTicket message and updating PSK to Draft 15.

BUG=77

Change-Id: Id8c45e98c4c22cdd437cbba1e9375239e123b261
Reviewed-on: https://boringssl-review.googlesource.com/10763
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

ssl/internal.h

diff --git a/ssl/internal.h b/ssl/internal.h
index 9a78a46..4719acb 100644
--- a/ssl/internal.h
+++ b/ssl/internal.h
@@ -1272,10 +1272,12 @@
 extern const SSL3_ENC_METHOD TLSv1_enc_data;
 extern const SSL3_ENC_METHOD SSLv3_enc_data;
 
-/* From draft-ietf-tls-tls13-14, used in determining ticket validity. */
-#define SSL_TICKET_ALLOW_EARLY_DATA 1
-#define SSL_TICKET_ALLOW_DHE_RESUMPTION 2
-#define SSL_TICKET_ALLOW_PSK_RESUMPTION 4
+/* From draft-ietf-tls-tls13-15, used in determining PSK modes. */
+#define SSL_PSK_KE        0x0
+#define SSL_PSK_DHE_KE    0x1
+
+#define SSL_PSK_AUTH      0x0
+#define SSL_PSK_SIGN_AUTH 0x1
 
 CERT *ssl_cert_new(void);
 CERT *ssl_cert_dup(CERT *cert);