Updating data in HEAP table with BTREE index results in wrong index_length
counter value, which keeps growing after each update.

When inserting new record into tree counter is incremented by:
sizeof(TREE_ELEMENT) + key_size + tree->size_of_element
But when deleting element from tree it doesn't decrement counter by key_size:
sizeof(TREE_ELEMENT) + tree->size_of_element

This fix makes accurate allocated memory counter for tree. That is
decrease counter by key_size when deleting tree element.

into  mysql.com:/home/MySQL/5.0-Bug-17248a

into  mysql.com:/home/psergey/mysql-5.0-csc9139

get_best_covering_ror_intersect() was copying ror_scans starting from the 
end of the array and not from its beginning.

into  rurik.mysql.com:/home/igor/dev/mysql-5.0-0

limit.

into  mysql.com:/opt/local/work/mysql-5.0-merge

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

into  zippy.(none):/home/cmiller/work/mysql/mysql-5.0__ready

into  rurik.mysql.com:/home/igor/dev/mysql-5.0-0

into  mysql.com:/usr/home/ram/work/5.0.b14360

into  mysql.com:/home/alexi/bugs/mysql-5.0-merge

 - Improved solution by adding an else stetment so that do find next is avoided if erorr occurs, but we still return zero files found instaed of an error

If the second or the third argument of a BETWEEN predicate was
a constant expression, like '2005.09.01' - INTERVAL 6 MONTH,
while the other two arguments were fields then the predicate 
was evaluated incorrectly and the query returned a wrong
result set.
The bug was introduced in 5.0.17 when in the fix for 12612.

into  mysql.com:/usr/home/ram/work/5.0.b14360

into  mysql.com:/home/mydev/mysql-5.0-bug5390

Add surrounding braces, move invalidate dictionary_cace to after declaration of variable "table_list"

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

into  mysql.com:/home/mydev/mysql-5.0-bug5390

into  mysql.com:/home/jimw/my/mysql-5.0-clean

into  mysql.com:/home/jimw/my/mysql-5.0-clean

into  rurik.mysql.com:/home/igor/dev/mysql-5.0-0

into  mysql.com:/home/mydev/mysql-5.0-bug5390

into  mysql.com:/usr/local/mysql/mysql-5.0-tmp

into  mysql.com:/home/alexi/bugs/mysql-5.0-15868-work

into  mysql.com:/home/jimw/my/mysql-5.0-clean

into  mysql.com:/usr/local/mysql/mysql-5.0-tmp

into  mysql.com:/home/mydev/mysql-5.0-bug5390

into  mysql.com:/usr/local/mysql/mysql-5.0-tmp

into  mysql.com:/home/alexi/bugs/mysql-5.0-15868

 Applied changes due Heikki Tuuri.

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

 - Grab the path from "configure --sysconfdir=<path>" and set it as
   the first place to look for my.cnf files
   Do this both in Makefiles for libmysql and mysys
 - Patch provided by Francesco Riosa. Thank you!

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0