being used on systems which don't support that interface.

    test_if_data_home_dir fixed to look into real path.
    Checks added to mi_open for symlinks into data home directory.

 per-file messages:
        include/my_sys.h
          Bug#32167 another privilege bypass with DATA/INDEX DIRECTORY.
          
          my_is_symlink interface added

        mysql-test/r/udf.result
          test result fixed (not related to #32167)

        mysys/my_symlink.c
          my_is_symlink() implementsd
          my_realpath() now returns the 'realpath' even if a file isn't a symlink

      
Reset session sql_mode before creating system tables as it
is done in the mysql_fix_privilege_tables.sql script.

scripts/mysql_system_tables.sql:
  reset sql_mode

      
      plugin_dir option backported from 5.1

per-file messages:
  sql/mysql_priv.h
    Bug#37428 Potential security issue with UDFs - linux shellcode execution.
    
    opt_plugin_dir and opt_plugin_dir_ptr declared.
  sql/mysqld.cc
    Bug#37428 Potential security issue with UDFs - linux shellcode execution.
    
    'plugin_dir' option added
  sql/set_var.cc
    Bug#37428 Potential security issue with UDFs - linux shellcode execution.
    
    'plugin_dir' option added.
  sql/sql_udf.cc
    Bug#37428 Potential security issue with UDFs - linux shellcode execution.
    
    opt_plugin_dir added to the udf->dl path. Warn if it's not specified.
  sql/unireg.h
    Bug#37428 Potential security issue with UDFs - linux shellcode execution.
    
    PLUGINDIR defined.

Revert fix for this bug as it introduced a regression
reported in Bug#38158.

client/mysql.cc:
  Revert fix for Bug#33812
mysql-test/r/mysql.result:
  Revert fix for Bug#33812
mysql-test/t/mysql_delimiter.sql:
  Revert fix for Bug#33812

Pull out some of unpack_dirname() into normalize_dirname(); this
new function does not expand "~" to the home directory.  Use this
function in unpack_dirname(), and use it during init_default_directories()
to remove duplicate entries without losing track of which directory
is a user's home dir.

enabled)

Before this fix, the lexer and parser would treat the ';' character as a
different token (either ';' or END_OF_INPUT), based on convoluted logic,
which failed in simple cases where a stored procedure is implemented as a
single statement, and used in a multi query.

With this fix:
- the character ';' is always parsed as a ';' token in the lexer,
- parsing multi queries is implemented in the parser, in the 'query:' rules,
- the value of thd->client_capabilities, which is the capabilities
  negotiated between the client and the server during bootstrap,
  is immutable and not arbitrarily modified during parsing (which was the
  root cause of the bug)

On certain kinds of errors (e.g., out of stack), a call to Item_func_
set_user_var::fix_fields() might fail.  Since the return value of this
call was not checked inside User_var_log_event::exec_event(), continuing
execution after this will cause a crash inside Item_func_set_user_var::
update_hash().

The bug is fixed by aborting execution of the event with an error if
fix_fields() fails, since it is not possible to continue execution anyway.


sql/log_event.cc:
  Aborting execution of event if fix_fields() fails since execution
  of update_hash() might cause a crash.

	to use ANSI_QUOTES

Make all have_* tests universally safe by using ANSI quotes.

Test was failing due to the addition of a '\x05' character in result sets
Latest builds of the server have shown this problem to have disappeared.
Removing code within the test that disables the test on Mac OS X.

Recommit due to tree error on earlier, approved patch.

   Bug#36787 Test funcs_1.charset_collation_1 failing
Details:
1. Skip charset_collation_1 if charset "ucs2_bin" is
   missing (property which distincts "vanilla" builds
   from the others)
2. Let builds with version_comment LIKE "%Advanced%"
   (found them for 5.1) execute charset_collation_3.
3. Update comments charset_collation.inc so that they
   reflect the current experiences.

      
Bug#35658 (An empty binary value leads to mysqld crash)
        
Before this fix, the following token
  b''
caused the parser to crash when reading the binary value from the empty string.
The crash was caused by:
  ptr+= max_length - 1;
because max_length is unsigned and was 0, causing an overflow.
        
With this fix, an empty binary literal b'' is parsed as a binary value 0,
in Item_bin_string.

mysql-test/r/varbinary.result:
  Bug#35658 (An empty binary value leads to mysqld crash)
mysql-test/t/varbinary.test:
  Bug#35658 (An empty binary value leads to mysqld crash)
sql/item.cc:
  Bug#35658 (An empty binary value leads to mysqld crash)

Bug#37492 timing bug in subselect.test
+ similar weaknesses found during testing
+ replace error numbers by error names

Normalize directory names before adding them to default_directories.


mysys/default.c:
  Normalize directory names with unpack_dirname() before adding them
  to default_directories.  This way, /etc/ and /etc will not count as
  duplicates.
  
  Because this entails allocating memory to store the normalized names,
  add error handling and ensure that it doesn't leak memory in case
  both my_print_defaults() and load_defaults() are called.
  
  Clean up the Windows code that finds the exe's parent directory, and
  pull it out into a separate function.
  
  Reorganize the code into a single init_default_directories() function,
  with internal #ifdefs, instead of init_default_directories_<system>()
  functions which were accessed via a function pointer.  This is more in
  line with normal MySQL coding style, and easier to read for some.

Bug#35480: BOM detection code crashes mysql CLI with zero-sized input
      
MySQL client crashed if no input was passed to it.

Bug#33812: mysql client incorrectly parsing DELIMITER
      
Remove unnecessary and incorrect code that tried
to pull delimiter commands out of the middle of
statements.

            as a commentary

mysql client has been modified to interpret EOL after
standalone -- commentary strings like whitespace
character (according to
http://dev.mysql.com/doc/refman/5.0/en/ansi-diff-comments.html)


mysql-test/t/mysql_delimiter.sql:
  Added test case for bug #36244.

     Bug#37167 funcs_1: Many tests fail if the embedded server is used.
     Bug#37164 funcs_1: Some tests fail if an optional character set is missing.
+ some cleanup within the testsuite related to the fixes above
+ some adjustments to open bugs on Mac OS X

configure.in:
  Raise version number after cloning 5.0.64
mysql-test/r/federated_disabled.result:
  Bug#37069 (5.0): implement --skip-federated
mysql-test/t/federated_disabled-master.opt:
  Bug#37069 (5.0): implement --skip-federated
mysql-test/t/federated_disabled.test:
  Bug#37069 (5.0): implement --skip-federated
mysys/errors.c:
  Fix for Bug#16902.
sql/mysqld.cc:
  Bug#37069 (5.0): implement --skip-federated

Ignore BitKeeper SCCS folders in make-dist

mysql-test/Makefile.am:
  Ignore BitKeeper SCCS folders in make-dist
  (copy only .txt files).