WL#5136 Pool of threads

Added an explicit delete_thread() API in the instrumentation,
to be used by the pool of threads implementations.

Before this fix, opening a configuration file located under "~" failed.
To evaluate the "~" path, home_dir needs to be initialized.
The 'home_dir' variable was initialized too late in my_init().

This fix:
- moved the home_dir initialization from my_init() to my_basic_init(),
  using getenv("HOME"))
- moved the initialization of my_umask / my_umask_dir also to
  my_basic_init(), to have all the my_umask / my_umask_dir init code in the
  same place.

The second part is not strictly required, but makes the code more
maintainable.

Tested the fix manually.

No MTR tests added, because MTR should not access or modify the $HOME
directory of the user running tests.

Fixed the dml_mutex_instances and dml_rwlock_instances to be more reliable.
In particular, the tests may not assume a mutex or rwlock is never locked.

Backport from 6.0 to 5.5

Bug#35578 Parser allows useless/illegal CREATE TABLE syntax
Bug#38696 CREATE TABLE ... CHECK ... allows illegal syntax

Backport from 6.0 to mysql-next-mr.

Windows and Solaris

Reviewed every call to my_error() using the va_args parameters,
to make sure the arguments type are ok.

Fixed the broken calls to my_error() to pass a strings as 'char *',
not LEX_STRING.

When compiling wiht ./configure --with-ssl=/usr,
which used OPEN_SSL but not YASSL, the code in sql/mysqld.cc
failed to build because of an incomplete performance schema instrumentation.

This fix implements properly the instrumentation for the rwlock
used in openssl_lock_t.

Verified that the code builds, and the ssl + performance schema tests
do pass.

in errmsg.txt. Kept the one in that matched the location
in errmsg-utf8.txt, ie after ER_UNKNOWN_LOCALE.

for regular PB builds.

        
Problem: The test case failed because: (i) warning text in 
         result file differed from the warning output by the 
         server, and (ii) binlog contents in result file did
         not show the statements logged wrapped in BEGIN/COMMIT
         as it is the case after WL 2687.
      
Solution: We update the result file, but first we change the
          unsafe warning text to also refer to performance_schema
          table(s). This required changing the result files for
          existing test cases that provide output for warnings 
          related to ER_BINLOG_UNSAFE_SYSTEM_TABLE. "Grepping" in
          result files, shows that only binlog_unsafe contained
          reference to such a warning.
      
          We also update the result file with the missing 
          BEGIN/COMMIT statements.

Conflicts:
  Text conflict in sql/sql_insert.cc 

STMT mode aborts the SQL Thread if it receives changes in ROW mode and such
changes are not processed.

When starting mysqld it did not recognize most of the options given on
the command line when it was compiled for 32-bit Solaris using Sun
Studio compiler. The cause for this was that most of the entries in
the my_long_options array contained "garbage" data. The garbage data
was caused by a compiler bug. When initilizing the def_value member
for the "default-storage-engine" entry it was initialized like this:

  (longlong)"MyISAM"

i.e. casting a 32 bit pointer to a 64 bit integer value. Due to the
compiler bug only 4 bytes was allocated (instead of 8 bytes). This
caused everything following this entry to be stored at a location that
was 4 byte wrong.

The fix/work-around for this problem is initialize the def_value
for default-storage-engine in my_long_options to 0 and instead
initialize the default_storage_engine variable to "MyISAM" in
init_common_variables().

sql/mysqld.cc:
  Due to a bug in Sun Studio compiler when generating 32 bit code the 
  initialization of the def_value member of the default-storage-engine entry 
  in my_long_options only got 4 bytes allocated instead of 8 bytes. 
  The compiler bug was triggered by casting a 32 bit pointer to a 64 bit 
  integer value in the initialization code for my_long_options. To avoid 
  triggering the compiler bug the intialization of the def_value in
  my_long_options is set to 0 and instead the default_storage_engine
  is initialized to "MyISAM" in init_common_variables().

  modified:
  include/m_ctype.h
  - Changing type for tolower/toupper members, to store values >= 0xFFFF.
  - Adding function prototypes

  mysql-test/r/ctype_big5.result
  mysql-test/r/ctype_cp932_binlog_stm.result
  mysql-test/r/ctype_eucjpms.result*
  mysql-test/r/ctype_euckr.result
  mysql-test/r/ctype_gb2312.result
  mysql-test/r/ctype_gbk.result
  mysql-test/r/ctype_sjis.result
  mysql-test/r/ctype_ujis.result
  mysql-test/t/ctype_big5.test
  mysql-test/t/ctype_cp932_binlog_stm.test
  mysql-test/t/ctype_eucjpms.test
  mysql-test/t/ctype_euckr.test
  mysql-test/t/ctype_gb2312.test
  mysql-test/t/ctype_gbk.test
  mysql-test/t/ctype_sjis.test
  mysql-test/t/ctype_ujis.test
  -  Adding tests

  strings/ctype-big5.c
  strings/ctype-cp932.c
  strings/ctype-euc_kr.c
  strings/ctype-eucjpms.c
  strings/ctype-gb2312.c
  strings/ctype-gbk.c
  strings/ctype-sjis.c
  - Adding upper/lower case conversion data

  strings/ctype-mb.c
  - Adding handling of upper/lower conversion for multi-byte characters.

  strings/ctype-ujis.c
  - Implementing shared upper/lower conversion
    functions  for ujis and eucjpms
  - Adding upper/lower case conversion data for ujis

Conflicts:
  Text conflict in sql/log.cc
  Text conflict in sql/slave.cc
  Text conflict in sql/sql_base.cc

         replicating

Replace c_ptr() calls with c_ptr_safe() calls to
avoid valgrind warnings.

Adding code to to handle the case that no metadata
was present in the table map for the column.

Allow first parameter to unpack_row() to be NULL,
in which case no source tables is used and hence
no checks nor conversions are done.

Clarifying some comments and fixing documentation
for unpack_row().

run in PB2 as it ought to be. Otherwise test will fail because
variable is no recognized:

1193: Unknown system variable 'slave_type_conversions'

  - mysqld--help-win
    Updated result so that it contains missing
    value for slave-type-conversions

  - rpl_idempotency
    This seems a bad merge. In BUG#39934, the contents of
    this file had been split into rpl_row_idempontency and
    rpl_idempotency. The patch was pushed to 5.1-rep+3 which
    was later merged in rep+2-delivery1 which in turn was
    merged in 5.1-rpl-merge. Now while merging next-mr in
    5.1-rpl-merge, the file got back it's old content (which
    is in rpl_row_idempotency now because of BUG#39934). This
    cset reverts the bad merge:

    bzr merge -r revid:dao-gang.qu@sun.com-20100112120709-ioxp11yl9bvquaqd..\
    before:revid:dao-gang.qu@sun.com-20100112120709-ioxp11yl9bvquaqd\
    suite/rpl/t/rpl_idempotency.test

  - sys_vars.rpl_init_slave_func
    Added suppression for the unsafe warning.