produce wrong data

By default Item_sp_func::val_str() returns string from it's result_field 
internal buffer. When grouping is present Item_copy_string is used to 
store SP function result, but it doesn't additionally buffer the result.
When the next record is read, internal buffer is overwritten, due to
this Item_copy_string::val_str() will have wrong data. Thus producing
weird query result.

The Item_func_sp::val_str() now makes a copy of returned value to prevent
occasional corruption.

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

into  zim.(none):/home/brian/mysql/mysql-5.0

This patch does 1) fix my build breakage  2) Complete the removal of all symbols which could clash with another parser. 

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

  Fix typos.

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

Makes you wonder what I am up to, doesn't?

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

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

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

 -Add test case
Move testcase that needs innodb from sp.test => sp_trans.test 

into moonbone.local:/work/17726-bug-5.0-mysql

into mysql.com:/home/hf/work/mysql-5.0.mrg

into  shellback.(none):/home/msvensson/mysql/mysqltestrun_ndbclusterstart/my50-mysqltestrun_ndbclusterstart

 - Fix problems that occur when ndbcluster is not supported

into  neptunus.(none):/home/msvensson/mysql/bug17137/my50-bug17137

into  neptunus.(none):/home/msvensson/mysql/bug17137/my50-bug17137

into  neptunus.(none):/home/msvensson/mysql/bug17137/my50-bug17137

 - Decrease "slave_open_temp_tables" during reopen of truncated table.
 - Add test "rpl_trunc_temp" 

into  shellback.(none):/home/msvensson/mysql/bug17574/my50-bug17574

only its own tables to prevent getting tables from others.

into  shellback.(none):/home/msvensson/mysql/bug17574/my50-bug17574

into  mysql.com:/home/alik/Documents/AllProgs/MySQL/devel/5.0-rt

into  mysql.com:/home/alik/Documents/AllProgs/MySQL/devel/5.0-rt

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

Reduce code

 - Use tmp sh file both in system and popen 

Use system inestad of exec