wrong help message corrected

client/mysqlcheck.c

@@ -87,7 +87,7 @@ static struct my_option my_long_options[] =
    (gptr*) &ignore_errors, (gptr*) &ignore_errors, 0, GET_BOOL, NO_ARG, 0, 0,
    0, 0, 0, 0},
   {"extended", 'e',
-   "If you are using this option with CHECK TABLE, it will ensure that the table is 100 percent consistent, but will take a long time. If you are using this option with REPAIR TABLE, it will run an extended repair on the table, which may not only take a long time to execute, but may produce a lot of garbage rows also!",
+   "If you are using this option with CHECK TABLE, it will ensure that the table is 100 percent consistent, but will take a long time. If you are using this option with REPAIR TABLE, it will force using old slow repair with keycache method, instead of much faster repair by sorting.",
    (gptr*) &opt_extended, (gptr*) &opt_extended, 0, GET_BOOL, NO_ARG, 0, 0, 0,
    0, 0, 0},
   {"help", '?', "Display this help message and exit.", 0, 0, 0, GET_NO_ARG,