Changing the default of libmysqlclient : it's now NO reconnection.

All our programs which use mysql_real_connect() and mysql_connect() are updated accordingly, though I have deliberately
made mysqlimport not reconnect anymore (already true for mysqldump >= 4.1.8).
All Connector devs have been warned about the change I'm doing here - which was agreed with Monty,
and fixes BUG#2555.

client/mysqlcheck.c

@@ -628,6 +628,7 @@ static int dbConnect(char *host, char *user, char *passwd)
     DBerror(&mysql_connection, "when trying to connect");
     return 1;
   }
+  mysql_connection.reconnect= 1;
   return 0;
 } /* dbConnect */