to start instance manager.

The problem was that if IM failed to start, test suite aborts.

The fix is to mark current test as failed, and continue running
test suite.

The fix affects only test suite.

The patch affects only test suite and has the following changes:

1. On starting Instance Manager -- added code for waiting for guarded
mysqld instances to create PID files;
2. Polishing;
3. Move IM-related operations out of mtr_process.pl into new dedicated
for IM file -- mtr_im.pl

into  alik.:/mnt/raid/alik/MySQL/devel/5.0-rt

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0-ndb

into  alik.:/mnt/raid/alik/MySQL/devel/5.0-rt

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0-ndb

into  perch.ndb.mysql.com:/home/jonas/src/50-work

  fix deadlock if master switches log file in parallell with "show master logs"
  

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

Fix problem where mysql-test-run.pl fails to start up the mysqld after a failed test. Shows up on win hosts where one failed test case make subsequent ones fails with error "Could not open connection 'default': 2003 Can't connect to MySQL server on 'localhost'" 

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

into  maint1.mysql.com:/data/localhome/tnurnberg/my50-21913

into  salvation.intern.azundris.com:/home/tnurnberg/21913/my50-21913

21913: DATE_FORMAT() Crashes mysql server if I use it through mysql-connector-j driver.

Variable character_set_results can legally be NULL (for "no conversion.")
This could result in a NULL deref that crashed the server.  Fixed.

(Although ran some additional precursory tests to see whether I could break
anything else, but no breakage so far.)

Variable character_set_results can legally be NULL (for "no conversion.")
This could result in a NULL deref that crashed the server.  Fixed.

(Although ran some additional precursory tests to see whether I could break
anything else, but no breakage so far.)

into  maint1.mysql.com:/data/localhome/tsmith/bk/mysql-5.0-maint

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

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

into  bk-internal.mysql.com:/data0/bk/mysql-5.0-cmake

into  maint2.mysql.com:/data/localhome/tsmith/bk/50

into  bk-internal.mysql.com:/data0/bk/mysql-5.0-cmake

into  maint1.mysql.com:/data/localhome/cmiller/mysql-5.0-maint

  Provide a more extensible, easier-to-change way of reordering
  test cases.

start instance; kill mysqlmanager; show ...

The problem was that Instance Manager didn't close client
sockets (sockets for client connections) on execing mysqld
instance. So, mysqld-instance inherits these descriptors.

The fix is to set close-on-exec flag for each client socket.

into  dl145s.mysql.com:/data/tkatchaounov/5.0-bug-21787

  
The problem was due to a prior fix for BUG 9676, which limited
the rows stored in a temporary table to the LIMIT clause. This
optimization is not applicable to non-group queries with aggregate
functions. The fix disables the optimization in this case.

into  mysql.com:/home/psergey/mysql-5.0-bug21477-look-64bit

make st_select_lex::setup_ref_array() take into account that 
Item_sum-descendant objects located within descendant SELECTs
may be added into ref_pointer_array.

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

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

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