prevent using references on sum function (except HAVING clouse of current select) and forward references

New operators MOD and DIV
SELECT ... FROM DUAL
TRUE = 1 and FALSE = 0

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

into mysql.r18.ru:/usr/home/ram/mysql-4.1.bdb

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

select sql_calc_found_rows * from table limit 0;
It does ...

into mysql.r18.ru:/usr/home/ram/mysql-4.1.bdb

into mysql.r18.ru:/usr/home/ram/mysql-4.1.monty1

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

into sanja.is.com.ua:/home/bell/mysql/work-explain-4.1

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

into serg.mysql.com:/usr/home/serg/Abk/mysql-4.1

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

into sanja.is.com.ua:/home/bell/mysql/work-crash-4.1

 - fixed switching from heap to MyISAM table
 - fixed error handler

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

to resolve derived table.

Will make a test case for this quite soon.

into mysql.r18.ru:/usr/home/ram/mysql-4.1.bdb

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

into bar.mysql.r18.ru:/usr/home/bar/mysql-4.1.wrk

into sinisa.nasamreza.org:/mnt/work/mysql-4.1