Third updated patch - this version also includes copyright notice in added Perl script.
This patch implements a check for such modules at runtime. If modules are not found or unable to load, the test is skipped with 
the following message:
            
            [ skipped ]  Test needs Perl modules DBI and DBD::mysql
            
Checks are done via a helper Perl script which looks for the module in a runtime environment that is as similar to that of the 
mysqlhotcopy script as possible (thus not intended for Windows environments at this time).
The helper script tells mysql-test about the result by writing information to a temporary file that is later read by mysql-test.
See comments in added files (have_dbi_dbd-mysql.inc and checkDBI_DBD-mysql.pl) for details.
The patch also removes the mysqlhotcopy tests from the list of disabled tests.

Fix backported from to 5.0.
"Remove the alignment option, let valgrind use its default"

Updated the copyright.

Updated Copyright.

Race condition may occur: mtr sees the .expect file but it's empty
Fix: wait and try again if file is empty
Addendum: try again if line isn't 'wait' or 'restart'
Also added verbose printout of extra restart options

ZERO
      
When dates are represented internally as strings, i.e. when a string constant
is compared to a date value, both values are converted to long integers,
ostensibly for fast comparisons. DATE typed integer values are converted to
DATETIME by multiplying by 1,000,000 (each digit pair representing hour,
minute and second, respectively). But the mechanism did not distuinguish
cached INTEGER values, already in correct format, from newly converted
strings.

Fixed by marking the INTEGER cache as being of DATETIME format.

The test were using external tools not available for embedded.

Fixed by rewriting the test to not rely on external tools like the mysql-client

Also fixed some non portable --exec commands and replaced #p# to #P# to pass
on windows.

            
rpl_packet got a timeout failure sporadically on PB when stopping
slave. The real reason of this bug is that STOP SLAVE stopped
IO thread first and then stopped SQL thread. It was
possible that IO thread stopped after replicating part of a
transaction which SQL thread was executing. SQL thread would
be hung if the transaction could not be rolled back safely.
            
After this patch, STOP SLAVE will stop SQL thread first and then stop IO
thread, which guarantees that IO thread will fetch the reset of the
events of the transaction that SQL thread is executing, so that SQL
thread can finish the transaction if it cannot be rolled back safely.
            
Added below auxiliary files to make the test code neater.
restart_slave_sql.inc
rpl_connection_master.inc
rpl_connection_slave.inc
rpl_connection_slave1.inc

Undoing the patch, it complicates the code but is not the solution

I do not beleive newline mismatch could be the cause of this failure
First, I cannot see how this could be a problem, mtr ignores the newline
  when reading the expect file, and the file is written and read on Windows.
Second, if this really was the problem it should have been deterministic:
  either the newline is correctly interepreted or it is not.

Problem: the scanner function tested for strings "<![CDATA[" and
"-->" without checking input string boundaries, which led to valgrind's
"Conditional jump or move depends on uninitialised value(s)" error.

Fix: Adding boundary checking.

  @ mysql-test/r/xml.result
  @ mysql-test/t/xml.test
  Adding test

  @ strings/xml.c
  Adding a helper function my_xml_parser_prefix_cmp(),
  with input string boundary check.

BUG#58858 : sys_vars.innodb_max_dirty_pages_pct_func fails sporadically

Committing After latest merge.      
Modified check_pct procedure to check return value of wait condition instead 
of calling "dirty_pct".
   
Adding Review comments:
1) Added comment for success variable value
2) Procedure check_pct changed For Adding BOOLEAN input and SELECT QUERY Change

Introduced by the fix for bug#44766.

Problem: it's not correct to use args[0]->str_value as a buffer,
because args[0] may need this buffer for its own purposes.

Fix: adding a new class member tmp_value to use as return value.

  @ mysql-test/r/ctype_many.result
  @ mysql-test/t/ctype_many.test
  Adding tests

  @ sql/item_strfunc.cc
  Changing code into traditional style:
  use "str" as a buffer for the argument and tmp_value for the result value.

  @ sql/item_strfunc.h
  Adding tmp_value

      
Problem: when processing a query like:
  SELECT '' LIKE '1' ESCAPE COUNT(1);
escape_item->val_str() was never executed and the "escape" class member
stayed initialized, which led to valgrind uninitialized memory error.
      
Note, a query with some tables in "FROM" clause
returns ER_WRONG_ARGUMENTS in the same situation:

   SELECT '' LIKE '1' ESCAPE COUNT(1) FROM t1;
   ERROR 1210 (HY000): Incorrect arguments to ESCAPE

Fix: disallowing using aggregate functions in ESCAPE clause,
even if there are no tables used. There is no much use of that anyway.

When mysqldadmin is run with sleep and count options,
it goes into an infinite loop and keeps executing the
specified command.

This happened because the statement, responsible for
decrementing the count value, was missing.

Fixed by adding a statement which will decrement the
count value for each iteration.

It is a backported patch.

Backport to 5.0.

/*![:version:] Query Code */, where [:version:] is a sequence of 5 
digits representing the mysql server version(e.g /*!50200 ... */),
is a special comment that the query in it can be executed on those 
servers whose versions are larger than the version appearing in the 
comment. It leads to a security issue when slave's version is larger 
than master's. A malicious user can improve his privileges on slaves. 
Because slave SQL thread is running with SUPER privileges, so it can
execute queries that he/she does not have privileges on master.
      
This bug is fixed with the logic below: 
- To replace '!' with ' ' in the magic comments which are not applied on
  master. So they become common comments and will not be applied on slave.
      
- Example:
  'INSERT INTO t1 VALUES (1) /*!10000, (2)*/ /*!99999 ,(3)*/
   will be binlogged as
  'INSERT INTO t1 VALUES (1) /*!10000, (2)*/ /* 99999 ,(3)*/

        IA64 and some other arcitectures use different float rounding mode and
        i find no decent way to make it consistent.
        So the test changed to be insensitive to this.

per-file messages:
  mysql-test/t/gis.test
Bug#52208      gis fails on some platforms (Solaris, HP-UX, Linux)
        --replace_result added

Bug#56895 part 2 of 2: Backport of revid holyfoot@mysql.com-20100825135522-8wrjjmvh2u2t0qo6 from mysql-5.5.
Without this patch mysqlhotcopy tests would fail due to not finding the mysqlhotcopy tool in release-like builds.
With this patch the tests would either pass, or fail due to missing Perl modules (see 56817).
Text conflict in mysql-test/mysql-test-run.pl:
 - resolved by using logic from 5.5 to find mysqlhotcopy, the intention of this backport. Changed bindir to basedir.