implementation of AVG(DISTINCT) which utilizes the approach with Fields.
The patch implemented in October is portede to the up-to-date tree 
containing DECIMAL type.
Tests for AVG(DISTINCT) (although there is not much to test provided
that SUM(DISTINCT) works), cleanups for COUNT(DISTINCT) and GROUP_CONCAT()
will follow in another changeset.

into poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

into pcgem.rdg.cyberkinetica.com:/var/db/bk/work-acurtis/bug3788.4

into poseidon.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

fix crashing bug in Dict caused by Suma on CREATE_SUBID_REF

into quadita2.mysql.com:/nfstmp1/guilhem/mysql-5.0

which is always false. In a very fast InnoDB shutdown, we just ensure that
no more transactions are running, flush InnoDB log, signal InnoDB threads to die,
and then return from InnoDB (from innobase_end()) without waiting for those threads
to actually die. I have tested on a 4CPU machine that even with --innodb_flush_log_at_trx_commit=0,
this optimized InnoDB very fast shutdown loses no committed transactions. Patch pre-approved by Heikki.

into poseidon.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

  Add dummy changelog file. It should merge upward without conflict.

into mysql.com:/home/pem/work/mysql-5.0

into mysql.com:/M50/mysql-5.0

into mysql.com:/home/pem/work/mysql-5.0

into ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-5.0

Reverted Jim's patch.

- bumped up version number in configure.in from 4.0.24 -> 4.0.25 (ChangeSet 1.2073 was already tagged
  as 4.0.24)

into poseidon.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

into mysql.com:/home/pem/work/mysql-5.0

into hundin.mysql.fi:/home/marko/mysql-5.0

(lost in merge because the code to open these logs was moved to a different
file).

into poseidon.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

into poseidon.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

into hundin.mysql.fi:/home/marko/mysql-5.0

fixed one bug in event, pk comes first in events...

into gluh.mysql.r18.ru:/home/gluh/MySQL-BUGS/mysql-4.0.7498

into hundin.mysql.fi:/home/marko/mysql-5.0

  row_search_for_mysql(): Add a clarifying comment.