re-using unused LOCK_active_mi to serialize all administrative
commands related to replication:
START SLAVE, STOP SLAVE, RESET SLAVE, CHANGE MASTER, init_slave()
(replication autostart at server startup), end_slave() (replication
autostop at server shutdown), LOAD DATA FROM MASTER.
This protects us against a handful of deadlocks (like BUG#2921
when two START SLAVE, but when two STOP SLAVE too).
Removing unused variables.

ChangeSet 1.1620.12.1 and ChangeSet 1.1625.2.1
from 4.1. This makes the slave I/O thread flush the relay log 
after every event, which provides additional safety in case
of brutal crash (reduces chances to lose a part of the relay log).

- the one about BUG#2921
- the one about relay log flushing
Both will be rewritten in a next changeset
(this one will not be pushed before the next changeset).

into mysql.com:/home/my/mysql-4.0

  Add typecasts to ulong because ulint is __int64 in Win 64-bits
  Better error message to the .err log if we have to crash the server because the buffer pool is exhausted by the lock table or the adaptive hash index

into teton.kitebird.com:/home/paul/mysql-4.0

Fix comment typos. (Skipp -> Skip)

(Fix hours/seconds always to display with two digits.)

into mysql.com:/home/mysql_src/mysql-4.0

INSERT DELAYED works only for one-row inserts (in latest 4.0 versions
at least). So killing a delayed_insert thread does not spoil replication:
the rows which actually went into the table are exactly those listed
in the binlog. So when the delayed_insert thread is killed, don't log
it as 'killed', because it causes superfluous stops on the slave.

into mysql.com:/home/my/mysql-4.0

Allow one to force lower_case_table_names to 0, even if the file system is case insensitive. This fixes some issues on Mac OS X (Bug #2994)
Added variables "lower_case_file_system", "version_compile_os" and "license"

into sanja.is.com.ua:/home/bell/mysql/bk/work-4.0

Useful in case mysqld was started with chroot.

into ua72d24.elisa.omakaista.fi:/home/my/bk/mysql-4.0

Setting insert delayed threads = 0 at mysql_init_command.

fixed linking query_prealloc_size to query cache presence

nsure that rows in a multi-row INSERT DELAYED are inserted atomicly

into mysql.com:/home/mysql_src/mysql-4.0

even if the thread was killed, we write the DROP with error_code=0.
This will remove unneeded stops on slave, and will lose nothing:
if a real update was killed, this real update will be logged with the
nonzero error code and will cause the stop on slave.

into serg.mylan:/usr/home/serg/Abk/mysql-4.0

  Protect the reading of the latest foreign key error explantion buffer with a mutex; in theory, a race condition could cause SHOW INNODB STATUS print garbage characters after the error info; remove the sprintf of the latest UNIQUE KEY error, since the buffer really was always empty

- server-side variable 'license' added

into mysql.com:/home/mysql_src/mysql-4.0

"(binlog, position) stored by InnoDB for a replication slave can be wrong".
This code contains conditional #if to distinguish between versions;
it should be merged into 4.1 and 5.0.

into morbus.(none):/home/ulli/work/mysql-4.0

"wrong Relay_Log_Pos if Rotate is in the middle of a transaction in relay log"
increment 'pending' instead of 'relay_log_pos'.

  Fix bug: in a FOREIGN KEY, ON UPDATE CASCADE was not triggered if the update changed a string to another value identical in alphabetical ordering, e.g., abc -> aBc

"mysqladmin.c & co fail to use MYSQL_PORT as the default value of the TCP/IP port"

into hundin.mysql.fi:/home/marko/m/mysql-4.0

  Removed bogus assertion

into serg.mylan:/usr/home/serg/Abk/mysql-4.0