Update comment from draft to RFC
diff --git a/include/polarssl/config.h b/include/polarssl/config.h
index a0ec2f3..9852aa9 100644
--- a/include/polarssl/config.h
+++ b/include/polarssl/config.h
@@ -913,8 +913,7 @@
 /**
  * \def POLARSSL_SSL_ALPN
  *
- * Enable support for Application Layer Protocol Negotiation.
- * draft-ietf-tls-applayerprotoneg-05
+ * Enable support for RFC 7301 Application Layer Protocol Negotiation.
  *
  * Comment this macro to disable support for ALPN.
  */