Post merge corrections.

  Post-review modifications for the fix of bug #7894.

  Added test cases for bug #7894.
sql_select.cc:
  Fixed bug #7894: GROUP BY queries with ROLLUP returned
  wrong results for expressions containing group by columns.
  The fix ensured correct results by replacement of all
  occurrences of group by fields in non-aggregate expressions
  for corresponding ref objects and preventing creation of
  fields in temporary tables for expression containing group
  by fields.

into  moonbone.local:/work/mysql-5.0-bug-9593

server"
Bug appears only on Windows platform. Freeing memory in 
TMP_TABLE_PARAM::cleanup() allocated by new Copy_fields[0] in 
setup_copy_fields() results in memory destruction. In test IF used instead 
of CONCAT because IF have more stable crash.

into serg.mylan:/usr/home/serg/Abk/mysql-5.0

into radha.local:/Users/patg/mysql-5.0

  "." is not in the PATH...

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

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

  Check in Jan's fix to bug #10746 and also add a note to ::start_stmt() that stored procs in 5.0 call it

    set net->no_send_error to 0 before execution of each element of
    multiquery statement to provide the sending of error to client

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

into mysql.com:/home/dlenev/src/mysql-5.0-ttdf

We can't have Item_trigger_field as aggregated object inside of
sp_instr_set_trigger_field class since in this case its destructor
will be called twice. So instead let us create this Item separately
and store pointer to it in instruction object.

 - Remove the expected warrnings when "show binary logs" are called on zero size binary log files. 

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

 - Add O_SHARE when opening file.

into mysql.com:/home/psergey/mysql-5.0-conf-fixes-2

into neptunus.(none):/home/msvensson/mysql/mysql-4.1

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

into mysql.com:/M41/mysql-4.1

into mysql.com:/M50/mysql-5.0

 - Dont perform automatic privilege handling for stored procedures when server is started --skip-grant-tables
 - Renamed view_skip_grants to skip_grants and added test cases for this

into hundin.mysql.fi:/home/marko/mysql-4.1

Moved detection of wrong decimal fields before decimal field was created to avoid ASSERT() for DECIMAL(1)