After merge fix

  After merge fix

into  sunlight.local:/local_work/tmp_merge-5.1-opt-mysql

into  sunlight.local:/local_work/tmp_merge-5.1-opt-mysql

  After merge fix

into  sunlight.local:/local_work/tmp_merge-5.1-opt-mysql

into  mysql.com:/home/psergey/mysql-5.1-bug14940-r4

into  sunlight.local:/local_work/tmp_merge-5.0-opt-mysql

into  sunlight.local:/local_work/tmp_merge-5.1-opt-mysql

into  sunlight.local:/home/evgen/bk-trees/mysql-5.1-opt

into  rama.(none):/home/jimw/my/mysql-5.1-clean

- Make the range-et-al optimizer produce E(#table records after table 
                                           condition is applied),
- Make the join optimizer use this value,
- Add "filtered" column to EXPLAIN EXTENDED to show 
  fraction of records left after table condition is applied
- Adjust test results, add comments

into  bodhi.local:/opt/local/work/mysql-5.1-runtime-merge

 - Add loop in mysqlslap that tries to connect up to 10 times if connect
   in thread fails.

into  rakia.(none):/home/kgeorge/mysql/autopush/B21019-5.0-opt

into  rakia.(none):/home/kgeorge/mysql/autopush/B20792-4.1-opt

into  rakia.(none):/home/kgeorge/mysql/autopush/B20792-5.0-opt

 - Disable 3 test cases that crashes slave

into  neptunus.(none):/home/msvensson/mysql/mysql-5.1-new-maint

into  bodhi.local:/opt/local/work/mysql-5.1-runtime-merge

into  orca.ndb.mysql.com:/space_old/pekka/ndb/version/my51-bug14935

into  bodhi.local:/opt/local/work/mysql-5.1-runtime-merge

into  moonbone.local:/work/19862-bug-5.0-opt-mysql

  Post review changes for bug#19862.

into  rakia.(none):/home/kgeorge/mysql/autopush/B20792-4.1-opt

into  macbook.gmz:/Users/kgeorge/mysql/work/B20792-5.0-opt

When processing aggregate functions all tables values are reset
to NULLs at the end of each group. 
When doing that if there are no rows found for a group
the const tables must not be reset as they are not recalculated 
by do_select()/sub_select() for each group.

into  rakia.(none):/home/kgeorge/mysql/autopush/B21019-4.1-opt

  Correct merge

into  macbook.gmz:/Users/kgeorge/mysql/work/B21019-5.0-opt