fix various issues

- improve document about configuration item.
- format issue
- variable type issue.

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>

include/mbedtls/mbedtls_config.h

@@ -1581,7 +1581,9 @@
 /**
  * \def MBEDTLS_SSL_TLS1_3_DEFAULT_NEW_SESSION_TICKETS
  *
- * Default number of NewSessionTicket. This is not used in TLS 1.2.
+ * Default number of NewSessionTicket messages to be sent by a TLS 1.3 server
+ * after handshake completion. This is not used in TLS 1.2 and relevant only if
+ * the MBEDTLS_SSL_SESSION_TICKETS option is enabled.
  *
  */
 #define MBEDTLS_SSL_TLS1_3_DEFAULT_NEW_SESSION_TICKETS 1

library/ssl_misc.h

@@ -625,7 +625,7 @@ struct mbedtls_ssl_handshake_params
     uint8_t tls13_kex_modes; /*!< Key exchange modes supported by the client */
 #endif
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-    int new_session_tickets_count;         /*!< number of session tickets */
+    uint16_t new_session_tickets_count;         /*!< number of session tickets */
 #endif
 #endif /* MBEDTLS_SSL_SRV_C */
 

library/ssl_tls.c

@@ -674,7 +674,6 @@ static void ssl_handshake_params_init( mbedtls_ssl_handshake_params *handshake )
     !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
     mbedtls_pk_init( &handshake->peer_pubkey );
 #endif
-
 }
 
 void mbedtls_ssl_transform_init( mbedtls_ssl_transform *transform )