The bug was that if the server was running in mixed binlogging mode,
and an INSERT DELAYED used some needing-row-based components like UUID(),
the server didn't binlog this row-based but statement-based, which
thus failed to insert correct data on the slave.
This changeset implements that when a delayed_insert thread is created,
if the server's global binlog mode is "mixed", that thread will use row-based.
This also fixes BUG#20633 "INSERT DELAYED RAND() or @user_var does not
replicate statement-based": we don't fix it in statement-based mode (would
require bookeeping of rand seeds and user variables used by each row),
but at least it will now work in mixed mode (as row-based will be used).
We re-enable rpl_switch_stm_row_mixed.test (so BUG#18590
which was about re-enabling this test, will be closed) to test the fixes.
Between when it was disabled and now, some good changes to row-based
binlogging (no generation of table map events for non-changed tables)
induce changes in the test's result file.

into  dator5.(none):/home/pappa/bug17138

into  dator5.(none):/home/pappa/bug17138

into  dator5.(none):/home/pappa/bug20583

into  dator5.(none):/home/pappa/bug17138

Last round of review fixes

into moonbone.local:/work/merge-5.1

into  mysql.com:/data0/knielsen/tmp-5.1

into  mysql.com:/usr/local/mysql/tmp-5.1

binary disctribution for Falcon.

into moonbone.local:/work/merge-5.1

into  mysql.com:/home/cps/mysql/trees/5.1-team

into  mysql.com:/home/my/mysql-5.1

(It failed even if test was marked as skipped)

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

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

into  mysql.com:/home/cps/mysql/trees/5.1-team

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

into  mysql.com:/home/stewart/Documents/MySQL/5.1/ndb

into  mysql.com:/users/lthalmann/bk/MERGE/mysql-5.1-merge

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

+ adopted signal to be as close as possible to 5.1...

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

into  mysql.com:/home/kgeorge/mysql/5.0/warnings

into  mysql.com:/home/kgeorge/mysql/4.1/warnings

Mark events_stress.test as 'big' as it's very slow on some machines

into  mysql.com:/home/my/mysql-5.1

into moonbone.local:/home/evgen/mysql-5.1-new

into  mysql.com:/home/my/mysql-5.1

into  xiphis.org:/home/antony/work2/p4-bug12096.3-merge