"Grantor" columns' data is lost when replicating mysql.tables_priv.
Slave SQL thread used its default user ''@'' as the grantor of GRANT|REVOKE
statements executing on it.

In this patch, current user is put in query log event for all GRANT and REVOKE
statement, SQL thread uses the user in query log event as grantor.

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Remove trx_t::active_trans. Split into two separate fields with distinct
responsibilities. trx_t::is_registered and trx_t::owns_prepare_mutex.
There are wrapper functions for using this fields in ha_innodb.cc. The
wrapper functions check for invariants.

Fix some formatting to conform to InnoDB guidelines.

Remove innobase_register_stmt() and innobase_register_trx_and_stmt().

Add:
trx_is_started()
trx_deregister_from_2pc()
trx_register_for_2pc()
trx_is_registered_for_2pc()
trx_owns_prepare_commit_mutex_set()
trx_has_prepare_commit_mutex()

rb://479, Approved by Jimmy Yang.

set to 128k.

The variable innodb_change_buffering_debug is only present in debug builds.
Hide it from the test, so that the test passes in both debug and non-debug.

These files were needed when InnoDB Plugin was maintained and distributed
separately from the MySQL 5.1 source tree. They have never been needed in
MySQL 5.5.

storage/innobase/mysql-test:
 Patches to the test suite.

storage/innobase/handler/mysql_addons.cc:
 Wrappers for private MySQL functions.

It is filling the error log when testing the debug version of the server.
The printout only seems to be useful when debugging a crash, not when
testing an instrumented version of the server.

Rows events were applied wrongly on the temporary table with the same name.
But rows events are generated only for base tables. As temporary
table's data never be binlogged on row mode. Normally, base table of the
same name cannot be updated if a temporary table has the same name.
But there are two cases which can generate rows events on 
the base table of same name.
      
Case1: 'CREATE TABLE ... SELECT' statement.
In mixed format, it will generate rows events if it is unsafe.
      
Case2: Drop a transactional temporary table in a transaction
       (happens only on 5.5+).
BEGIN;
DROP TEMPORARY TABLE t1;       # t1 is a InnoDB table
INSERT INTO t1 VALUES(rand()); # t1 is a MyISAM table
COMMIT;
'DROP TEMPORARY TABLE' will be put in the transaction cache and
binlogged after the rows events generated by the 'INSERT' statement.
      
After this patch, slave opens only base table when applying a rows event.

index or foreign key

Approved by Sunny Bains

Fix assorted warnings that are generated in optimized builds.
Most of it is silencing variables that are set but unused.

This patch also introduces the MY_ASSERT_UNREACHABLE macro
which helps the compiler to deduce that a certain piece of
code is unreachable.

Fix assorted compiler warnings.

Declare DATA_MBMAXLEN with the same data type as DATA_MBMINLEN.

Rename buf_pool_watch, buf_pool_mutex, buf_pool_zip_mutex
to buf_pool->watch, buf_pool->mutex, buf_pool->zip_mutex
in comments. Refer to buf_pool->flush_list_mutex instead of
flush_list_mutex.

Remove obsolete declarations of buf_pool_mutex and buf_pool_zip_mutex.

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In the fix for Bug#53916 also apply equivalent changes to CMakeLists.txt

            
For DATA_MBMINLEN(), cast the result of UNIV_EXPECT to ulint because in GCC
it returns a long causing unsigned/signed comparison warnings.

Approved by Jimmy Yang on IM.

Tag or remove unused arguments and variables.

Ensure that fdatasync is properly declared as on Mac OS X, the
function is available but there is no prototype. Also, port a
fix for a warning from the InnoDB plugin over to the builtin. 

Just check for all the functions that we are going to use, not a subset
of them.

Reviewed by:	Davi (via IRC)

Tag unused arguments.
      
Approved by: Marko (via IRC)

Tag unused arguments.

Approved by: Marko (via IRC)

Fix assorted compiler warnings on Mac OS X.

           data dictionary confusion

On file systems with case insensitive file names, and
lower_case_table_names set to '2', the server could crash
due to a table definition cache inconsistency.  This is 
the default setting on MacOSX, but may also be set and
used on MS Windows.

The bug is caused by using two different strategies for
creating the hash key for the table definition cache, resulting
in failure to look up an entry which is present in the cache,
or failure to delete an existing entry.  One strategy was to
use the real table name (with case preserved), and the other
to use a normalized table name (i.e a lower case version).

This is manifested in two cases.  One is  during 'DROP DATABASE', 
where all known files are removed.  The removal from
the table definition cache is done via a generated list of
TABLE_LIST with keys (wrongly) created using the case preserved 
name.  The other is during CREATE TABLE, where the cache lookup
is also (wrongly) based on the case preserved name.
   
The fix was to use only the normalized table name when
creating hash keys.

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