After the earlier fix, mtr tests reports "table full" messages as warnings. This is 
expected, this patch fixes the mtr testframework to ignore the error message.

mysql-test/lib/mtr_report.pl:
  fixed mtr_report_stats to ignore the Table Full error messages generated by the testcases main.almost_full, main.myisam_data_pointer_size_func

Item_in_optimizer::is_null() evaluated "NULL IN (SELECT ...)" to NULL regardless of
whether subquery produced any records, this was a documented limitation.

The limitation has been removed (see bugs 8804, 24085, 24127) now
Item_in_optimizer::val_int() correctly handles all cases with NULLs. Make
Item_in_optimizer::is_null() invoke val_int() to return correct values for
"NULL IN (SELECT ...)".


mysql-test/r/subselect.result:
  BUG#37822: Correlated subquery with IN and IS UNKNOWN provides wrong result
  - Testcase
mysql-test/t/subselect.test:
  BUG#37822: Correlated subquery with IN and IS UNKNOWN provides wrong result
  - Testcase

            messed up

"ROW(...) IN (SELECT ... FROM DUAL)" always returned TRUE.

Item_in_subselect::row_value_transformer rewrites "ROW(...)
IN SELECT" conditions into the "EXISTS (SELECT ... HAVING ...)"
form.
For a subquery from the DUAL pseudotable resulting HAVING
condition is an expression on constant values, so further
transformation with optimize_cond() eliminates this HAVING
condition and resets JOIN::having to NULL.
Then JOIN::exec treated that NULL as an always-true-HAVING
and that caused a bug.

To distinguish an optimized out "HAVING TRUE" clause from
"HAVING FALSE" we already have the JOIN::having_value flag.
However, JOIN::exec() ignored JOIN::having_value as described
above as if it always set to COND_TRUE.

The JOIN::exec method has been modified to take into account
the value of the JOIN::having_value field.


mysql-test/r/subselect3.result:
  Added test case for bug #39069.
mysql-test/t/subselect3.test:
  Added test case for bug #39069.
sql/sql_select.cc:
  Bug #39069: <row constructor> IN <table-subquery> seriously
              messed up
  
  The JOIN::exec method has been modified to take into account
  the value of the JOIN::having_value field.

Dirty close tricky does not work on Windows.

mysql-test/r/query_cache_notembedded.result:
  Remove test case result.
mysql-test/t/query_cache_notembedded.test:
  Remove test case.

      
Re-generated the PKI files needed.
Removed the ones that are not needed.
Updated the tests to reference the correct SSL subject.

mysql-test/r/openssl_1.result:
  Bug #42366: Updated the tests to reference the correct SSL subject
mysql-test/std_data/cacert.pem:
  Bug #42366: Re-generated the PKI files needed.
mysql-test/std_data/client-cert.pem:
  Bug #42366: Re-generated the PKI files needed.
mysql-test/std_data/client-key.pem:
  Bug #42366: Re-generated the PKI files needed.
mysql-test/std_data/server-cert-des.pem:
  Bug #42366: Removed the ones that are not needed.
mysql-test/std_data/server-cert.pem:
  Bug #42366: Re-generated the PKI files needed.
mysql-test/std_data/server-key-des.pem:
  Bug #42366: Removed the ones that are not needed.
mysql-test/std_data/server-key.pem:
  Bug #42366: Re-generated the PKI files needed.
mysql-test/std_data/server8k-cert.pem:
  Bug #42366: Re-generated the PKI files needed.
mysql-test/std_data/server8k-key.pem:
  Bug #42366: Re-generated the PKI files needed.
mysql-test/t/openssl_1.test:
  Bug #42366: Updated the tests to reference the correct SSL subject

When a MEMORY table is full the error is returned to client but not written
to error log.

Fixed the handler api to write the error mesage to error log when the table is
full.

Note: No TestCase included as testing the error log is non-trivial.


sql/handler.cc:
  Fixed handler::print_error() to write the error message to error log
  when the table is full.

      
The fix for BUG#20103 "Escaping with backslash does not work as expected"
was implemented too greedy though in that it not only changes the behavior
of backslashes within strings but in general, so disabling command shortcuts
like \G or \C (which in turn leads to Bug #36391: "mysqlbinlog creates invalid charset
statements").
      
The fix allows the escaping with backslash to take place only inside a string, 
thus enabling the execution of command shortcuts and presevering the fix for
BUG#20103.

Fixing pb failures caused by mtr invokes the test with --tmpdir to which
there are  sensitive operations in the test
and setup_fake_relay_log.inc also needed --secure-file-priv for its own separate
directory.

Fixed with removing SELECT INTO OUTFILE and deploying --exec echo instead in the marco.
The test's opt file should contain --secure-file-priv=$MYSQL_TEST_DIR as the test
operations deal with files located in $MYSQL_TEST_DIR.

mysql-test/include/setup_fake_relay_log.inc:
  Refining setup_fake_relay_log.inc to not use --secure-file-priv sensitive feature.
  The latter should remain available for the test.

      
Overriding a default value of --secure-file-priv on pb.mtr to be $MYSQLTEST_VARDIR which 
makes pb's mtr happy to execute the regression test for the bug.


mysql-test/suite/rpl/t/rpl_cross_version-master.opt:
  satisfying pb's mtr that uses --vardir to shm.

Overriding a default value of --secure-file-priv on pb.mtr with a value allowable 
the test to pass on pb.

mysql-test/suite/rpl/t/rpl_cross_version-master.opt:
  Overriding a default value of --secure-file-priv with a value allowable the test to pass on pb.

  myisam_repair_threads > 1 causes crash

Problem: parallel repair (myisam_repair_threads > 1) of a myisam
table with two or more fulltext keys that use the same parser may
lead to a server crash. ALTER TABLE ENABLE KEYS is affected as well.

Fix: properly initialize fulltext structures for parallel repair.

Note: 1. there's no deterministic test case.
2. now we call parser->init() for each fulltext key
(not for each fulltext parser used).


storage/myisam/ft_parser.c:
  Fix for bug #37756: enabling fulltext indexes with
    myisam_repair_threads > 1 causes crash
  
  In ftparser_call_initializer() we "group" parsers
  and allocate parameters for each unique parser used.
  In case of parallel repairing we may have a bunch
  of parsers that use the only MI_INFO structure.
  Each of these parsers must have its own parameter
  structure in order not to interfere with others.
  
  Moreover, the allocation is done without mutex
  lock so parallel ftparser_call_initializer() calls
  are unsafe.
  
  Now we don't "group" the fulltext parsers.
  Parameter allocation code moved to ftparser_alloc_param()
  function which is called from mi_repair_parallel() as well
  to allocate parameters for each parser used.
storage/myisam/ftdefs.h:
  Fix for bug #37756: enabling fulltext indexes with
    myisam_repair_threads > 1 causes crash
  
  ftparser_alloc_param(MI_INFO *info) added.
storage/myisam/mi_check.c:
  Fix for bug #37756: enabling fulltext indexes with
    myisam_repair_threads > 1 causes crash
  
  ftparser_alloc_param(info) called in case of parallel
  repair to allocate fulltext parser parameters.
storage/myisam/mi_open.c:
  Fix for bug #37756: enabling fulltext indexes with
    myisam_repair_threads > 1 causes crash
  
  set keyinfo->ftkey_nr and share->ftkeys.

           in trigger

Interchangeable calls to the mysql_change_user client function
and invocations of a trigger changing some user variable caused
a memory corruption and a crash.

The mysql_change_user API call forces TDH::cleanup() on a server
that frees user variable entries.
However it didn't reset Item_func_set_user_var::entry to NULL
because Item_func_set_user_var::cleanup() was not overloaded.
So, Item_func_set_user_var::entry held a pointer to freed memory,
that caused a crash.

The Item_func_set_user_var::cleanup method has been overloaded
to cleanup the Item_func_set_user_var::entry field.


mysql-test/r/user_var.result:
  Added test case for bug #42188.
mysql-test/t/user_var.test:
  Added test case for bug #42188.
sql/item_func.cc:
  Bug#42188: crash and/or memory corruption with user variables
             in trigger
  
  The Item_func_set_user_var::cleanup method has been overloaded
  to cleanup the Item_func_set_user_var::entry field.
sql/item_func.h:
  Bug#42188: crash and/or memory corruption with user variables
             in trigger
  
  The Item_func_set_user_var::cleanup method has been overloaded
  to cleanup the Item_func_set_user_var::entry field.

Deleted the opt file. Replaced the sleeps by wait condition. Made some beautyfications.
Inserted review results.   

an additional changeset to remove printing a path name.

mysql-test/suite/rpl/r/rpl_cross_version.result:
  removing a local exec env dependency
mysql-test/suite/rpl/t/rpl_cross_version.test:
  refining a test to not have local exec env dependency.

It's a regression issue.
The reason of the bug appeared to be an error introduced into 5.1 source code.
A piece of code in Create_file_log_event::do_apply_event() did not have test
coverage which made make test and pb unaware.
      
Fixed with inverting the old value of the return value from 
Create_file_log_event::do_apply_event().
The rpl test suite is extended with `rpl_cross_version' the file to hold 
regression cases similar to the current.


mysql-test/suite/rpl/r/rpl_cross_version.result:
  new results file
mysql-test/suite/rpl/t/rpl_cross_version-master.opt:
  options to the server to be able to start replication to itself
mysql-test/suite/rpl/t/rpl_cross_version.test:
  regression test for bug#31240.
sql/log_event.cc:
  Correcting the return value from  Create_file_log_event::do_apply_event()

sql/sql_cache.cc:
  Assert that results are always complete.

The problem is that the query cache was storing partial results
if the statement failed when sending the results to the client.
This could cause clients to hang when trying to read the results
from the cache as they would, for example, wait indefinitely for
a eof packet that wasn't saved.

The solution is to always discard the caching of a query that
failed to send its results to the associated client.

mysql-test/r/query_cache_notembedded.result:
  Add test case result for Bug#40264
mysql-test/t/query_cache_notembedded.test:
  Add test case for Bug#40264
sql/sql_cache.cc:
  Abort if a unreported error was raised.

Extending the existing testcase written for BUG#40949 to verify
repair table operation for compressed tables



mysql-test/r/myisampack.result:
  Modified result file for myisampack.test
mysql-test/t/myisampack.test:
  Modified Testcase to test repair operation for compressed tables

clause server fires immediately after creating event and time between create and delete
event sometimes is enough for firing. So adding STARTS clause moves first execution in
future after drop of event
1. Added STARTS clause for CREATE EVENT.
2. Updated result file.

character_set_database !=character_set_server" is fixed.