insert_id after succ. mysql_change_user() call.

See also WL 4066.
  
This bug reveals two problems:
  - the problem on the client side which was described originally;
  - the problem in protocol / the server side: connection context
    on client and server should be like after mysql_real_connect()
    and be consistent. The server however just resets character
    set variables to the global defaults.

The fix seems to be as follows:
  - extend the protocol so that the client be able to send
    character set information in COM_CHANGE_USER command;
  - change the server so that it understands client character set
    in the command;
  - change the client:
    - reset character set to the default value (which has been
      read from the configuration);
    - send character set in COM_CHANGE_USER command.


client/client_priv.h:
  Declare a function, used in libmysql.c and client.c.
libmysql/libmysql.c:
  1. Reset character set on the client in mysql_change_user().
  2. Send character set to the server in COM_CHANGE_USER command.
mysql-test/t/mysql_client_test.test:
  mysql_client_test.log is used by the test suite.
  
  Use mysql_client_test.out.log to collect mysql_client_test
  real output.
sql/sql_parse.cc:
  Switch character set in COM_CHANGE_USER.
tests/mysql_client_test.c:
  Test case for BUG#30472.

insert_id after succ. mysql_change_user() call.

Supply a correct packet length to dispatch command.


sql/sp_head.cc:
  Fix packet length.
sql/sql_parse.cc:
  Fix packet length.
sql/sql_prepare.cc:
  Fix packet length.
tests/mysql_client_test.c:
  Test case for COM_CHANGE_USER.

MySQL provides what appears to be a non standard extension to the
FOREIGN KEY syntax which let users name (label/tag) a foreign key
to more easily identify a specific foreign key if any problems show
up later during the query parsing or execution. But the foreign key
name was not being properly set to the right key, possible leaving
the foreign key with no name.


mysql-test/include/mix1.inc:
  Add test case for Bug#30747
mysql-test/r/innodb_mysql.result:
  Add test case result for Bug#30747
sql/sql_yacc.yy:
  Set the foreign key name to the constraint name if a specific name was
  not provided. As for the constraint name, only use the foreign name if
  a specific name was not provided.

into  lambda.weblab:/home/malff/TREE/mysql-5.1-28360-b


sql/sql_yacc.yy:
  Auto merged

sql/sql_yacc.yy:
  Remove useless actions from the grammar.
  Empty {} actions in the middle of a rule caused an extra reduce,
  which is affecting the parser complexity and performances.

  UPGRADE)

Bug 17565 (RENAME DATABASE destroys events)
Bug#28360 (RENAME DATABASE destroys routines)

Removed the
  RENAME DATABASE db1 TO db2
statement.

Implemented the
  ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
statement, which has the same function.


client/mysqlcheck.c:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/r/create.result:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/r/query_cache.result:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/r/renamedb.result:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/r/sp-code.result:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/r/sp-error.result:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/r/upgrade.result:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/t/create.test:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/t/query_cache.test:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/t/renamedb.test:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/t/sp-error.test:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
mysql-test/t/upgrade.test:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
sql/mysql_priv.h:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
sql/sql_lex.h:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
sql/sql_parse.cc:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
sql/sql_prepare.cc:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
sql/sql_yacc.yy:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
sql/sql_db.cc:
    ALTER DATABASE db UPGRADE DATA DIRECTORY NAME

into  adventure.(none):/home/thek/Development/cpp/mysql-5.1-runtime


sql/sql_insert.cc:
  Auto merged

into  adventure.(none):/home/thek/Development/cpp/bug27358/my51-bug27358


mysql-test/r/delayed.result:
  Auto merged
mysql-test/t/delayed.test:
  Auto merged
sql/sql_insert.cc:
  SCCS merged

into  moksha.local:/Users/davi/mysql/push/mysql-5.1-runtime

the first query is not running while we are doing wait queries on
a second connection.


mysql-test/r/insert_notembedded.result:
  Test case result for bug 28587 moved from insert_update.result
mysql-test/r/insert_update.result:
  Remove test case result for bug 28587, moving to insert_notembedded.result
mysql-test/t/insert_notembedded.test:
  Test case result for bug 28587, moved from insert_update.test
mysql-test/t/insert_update.test:
  Remove test case for bug 28587, moving to insert_notembedded.test

mysql-test/t/events.test:
  Wait until event scheduler thread reaches exactly the same state
  which later appears in the results of select from processlist.

into  omega.weblab:/home/malff/TREE/mysql-5.1-rt-merge

into  omega.weblab:/home/malff/TREE/mysql-5.1-cleanup

Fixed test failure under heavy load, in case truncate table is slow.


mysql-test/r/events_logs_tests.result:
  Fixed test failure under heavy load, in case truncate table is slow.
mysql-test/t/events_logs_tests.test:
  Fixed test failure under heavy load, in case truncate table is slow.

the first query is not running while we are doing wait queries on
a second connection.


mysql-test/r/sp.result:
  Remove test case result for Bug#29936, moving to sp_notembedded.result
mysql-test/r/sp_notembedded.result:
  Test case result for Bug#29936, moved from sp.result
mysql-test/t/sp.test:
  Remove test case for Bug#29936, moving to sp_notembedded.test
mysql-test/t/sp_notembedded.test:
  Test case result for Bug#29936, moved from sp.test

Discovered a bug while working with backup. Since it is possible to execute a statement in a pre/post statment clause that can return a result, we need to test for that and free it. 


client/mysqlslap.c:
  Cleanup resuls if rows are returned.

into  weblab.(none):/home/marcsql/TREE/mysql-5.1-rt50-merge


mysql-test/r/sp.result:
  Auto merged
mysql-test/t/mysql.test:
  Auto merged
mysql-test/t/sp.test:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/sql_cache.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged

into  weblab.(none):/home/marcsql/TREE/mysql-5.0-rt-merge


mysql-test/r/sp.result:
  Auto merged
mysql-test/t/mysql.test:
  Auto merged
mysql-test/t/sp.test:
  Auto merged

into  weblab.(none):/home/marcsql/TREE/mysql-5.1-rt50-merge


mysql-test/r/sp.result:
  Auto merged
mysql-test/t/mysql.test:
  Auto merged
mysql-test/t/query_cache.test:
  Auto merged
mysql-test/t/sp.test:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/rpl_utility.h:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_cache.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged

into  adventure.(none):/home/thek/Development/cpp/mysql-5.1-runtime

into  adventure.(none):/home/thek/Development/cpp/mysql-5.1-runtime


sql/sql_cache.cc:
  Auto merged

into  station.:/mnt/raid/alik/MySQL/5.1-rt-build

into  adventure.(none):/home/thek/Development/cpp/mysql-5.0-runtime


sql/sql_cache.cc:
  Auto merged

into  adventure.(none):/home/thek/Development/cpp/bug21074/my51-bug21074


sql/sql_cache.cc:
  Null merge

statement.


mysql-test/suite/rpl/r/rpl_ps.result:
  Update result file.

c++config.h now has the following code:
// For example, <windows.h> is known to #define min and max as macros...
#undef min
#undef max

So, our defines in my_global.h are undefined when <new> header
is included.

Move definitions of min()/max() to the end of my_global.h.

into  adventure.(none):/home/thek/Development/cpp/mysql-5.1-runtime


sql/sql_cache.cc:
  Auto merged

into  adventure.(none):/home/thek/Development/cpp/mysql-5.0-runtime


sql/sql_cache.cc:
  Auto merged

into  adventure.(none):/home/thek/Development/cpp/mysql-5.0-runtime


sql/sql_cache.cc:
  Auto merged

into  adventure.(none):/home/thek/Development/cpp/bug21074/my51-bug21074


sql/sql_cache.cc:
  Null merge

Invaldating a subset of a sufficiently large query cache can take a long time.
During this time the server is efficiently frozen and no other operation can
be executed. This patch addresses this problem by setting a time limit on
how long time a dictionary access request can take before giving up on the 
attempt. This patch does not work for query cache invalidations issued by
DROP, ALTER or RENAME TABLE operations.


sql/sql_cache.cc:
  Changed mutex locking to a timed spinn lock. If access to query cache dictionary
  takes "a long time" (currently more than 0.1 seconds) the system fall backs on
  ordinary statement execution.

into  pilot.(none):/data/msvensson/mysql/mysql-5.1-new-maint

into  pilot.(none):/data/msvensson/mysql/mysql-5.1-new-maint


mysql-test/lib/mtr_misc.pl:
  Auto merged

into  pilot.(none):/data/msvensson/mysql/mysql-5.0-maint


mysql-test/lib/mtr_misc.pl:
  Auto merged

into  weblab.(none):/home/marcsql/TREE/mysql-5.1-30712


sql/log.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged

mysql-test/t/events.test:
  
  Wait for the select get_lock() to actually get the lock
  wait for release_lock() to actually release the lock