Merge branch '2.3' into develop

include/maxscale/protocol/mysql.hh

@@ -145,6 +145,9 @@ typedef struct mysql_session
     char     db[MYSQL_DATABASE_MAXLEN + 1];         /*< database       */
     int      auth_token_len;                        /*< token length   */
     uint8_t* auth_token;                            /*< token          */
+    bool     correct_authenticator;                 /*< is session using mysql_native_password? */
+    uint8_t  next_sequence;                         /*< Next packet sequence */
+    bool     auth_switch_sent;                      /*< Expecting a response to AuthSwitchRequest? */
 } MYSQL_session;
 
 /** Protocol packing macros. */