Update references to RFC 7905.

Change-Id: I6ef23a23da3957eccbe6cd03727b9a9f367f6ef0
Reviewed-on: https://boringssl-review.googlesource.com/8470
Reviewed-by: Adam Langley <agl@google.com>

include/openssl/ssl.h

@@ -1081,9 +1081,8 @@ OPENSSL_EXPORT int SSL_CIPHER_is_AES128CBC(const SSL_CIPHER *cipher);
 OPENSSL_EXPORT int SSL_CIPHER_is_AES256CBC(const SSL_CIPHER *cipher);
 
 /* SSL_CIPHER_is_CHACHA20POLY1305 returns one if |cipher| uses
- * CHACHA20_POLY1305. Note this includes both the
- * draft-ietf-tls-chacha20-poly1305-04 and draft-agl-tls-chacha20poly1305-04
- * versions. */
+ * CHACHA20_POLY1305. Note this includes both the RFC 7905 and
+ * draft-agl-tls-chacha20poly1305-04 versions. */
 OPENSSL_EXPORT int SSL_CIPHER_is_CHACHA20POLY1305(const SSL_CIPHER *cipher);
 
 /* SSL_CIPHER_is_NULL returns one if |cipher| does not encrypt. */

include/openssl/tls1.h

@@ -432,6 +432,7 @@ extern "C" {
 #define TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305_OLD 0x0300CC13
 #define TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305_OLD 0x0300CC14
 
+/* ChaCha20-Poly1305 cipher suites from RFC 7905. */
 #define TLS1_CK_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 0x0300CCA8
 #define TLS1_CK_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 0x0300CCA9
 #define TLS1_CK_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256 0x0300CCAC