The fix blocks execution of any constant sub-expressions of
the defining expressions for virtual columns when context
analysis if these expressions is performed.

Fixed a compiler warning.

Also, change windows timespec definition to be Unix-ish - simplifies handling a lot.

A lot of small fixes and new test cases.

client/mysqlbinlog.cc:
  Cast removed
client/mysqltest.cc:
  Added missing DBUG_RETURN
include/my_pthread.h:
  set_timespec_time_nsec() now only takes one argument
mysql-test/t/date_formats.test:
  Remove --disable_ps_protocl as now also ps supports microseconds
mysys/my_uuid.c:
  Changed to use my_interval_timer() instead of my_getsystime()
mysys/waiting_threads.c:
  Changed to use my_hrtime()
sql/field.h:
  Added bool special_const_compare() for fields that may convert values before compare (like year)
sql/field_conv.cc:
  Added test to get optimal copying of identical temporal values.
sql/item.cc:
  Return that item_int is equal if it's positive, even if unsigned flag is different.
  Fixed Item_cache_str::save_in_field() to have identical null check as other similar functions
  Added proper NULL check to Item_cache_int::save_in_field()
sql/item_cmpfunc.cc:
  Don't call convert_constant_item() if there is nothing that is worth converting.
  Simplified test when years should be converted
sql/item_sum.cc:
  Mark cache values in Item_sum_hybrid as not constants to ensure they are not replaced by other cache values in compare_datetime()
sql/item_timefunc.cc:
  Changed sec_to_time() to take a my_decimal argument to ensure we don't loose any sub seconds.
  Added Item_temporal_func::get_time() (This simplifies some things)
sql/mysql_priv.h:
  Added Lazy_string_decimal()
sql/mysqld.cc:
  Added my_decimal constants max_seconds_for_time_type, time_second_part_factor
sql/table.cc:
  Changed expr_arena to be of type CONVENTIONAL_EXECUTION to ensure that we don't loose any items that are created by fix_fields()
sql/tztime.cc:
  TIME_to_gmt_sec() now sets *in_dst_time_gap in case of errors
  This is needed to be able to detect if timestamp is 0
storage/maria/lockman.c:
  Changed from my_getsystime() to set_timespec_time_nsec()
storage/maria/ma_loghandler.c:
  Changed from my_getsystime() to my_hrtime()
storage/maria/ma_recovery.c:
  Changed from my_getsystime() to mmicrosecond_interval_timer()
storage/maria/unittest/trnman-t.c:
  Changed from my_getsystime() to mmicrosecond_interval_timer()
storage/xtradb/handler/ha_innodb.cc:
  Added support for new time,datetime and timestamp
unittest/mysys/thr_template.c:
  my_getsystime() -> my_interval_timer()
unittest/mysys/waiting_threads-t.c:
  my_getsystime() -> my_interval_timer()

CMake 2.8.4 crashed on this line
 IF(something AND IS_DIRECTORY(something_else))
when both  "something" and "something_else" were empty.

Changing the line slightly (using cascading "IF" instead)  solved the crash.

Disable call to setpriority() in pbxt. This caused mysqld to run with nice priority -19, which was far from optimal.

mysql-test/suite/innodb/r/innodb_bug60049.result:
  Updated results
mysql-test/suite/innodb/t/innodb_bug60049.test:
  Force global.innodb_fast_shutdown to 0 as test require it
mysql-test/suite/innodb_plugin/t/innodb_bug60049.test:
  Force global.innodb_fast_shutdown to 0 as test require it
storage/pbxt/src/pthread_xt.cc:
  Disable call to setpriority()

The error message is now based on GetLastError() rather than errno. 

Background: errno is C runtime specific and in many circumstances 
it is not set, e.g when using Win32 API or socket functions.

This simplifies postmortem analysis for crashes reported via Winqual.

HEAP is deprecated in favor of MEMORY.

mysql-test/suite/funcs_1/r/innodb_func_view.result:
  Updated results
mysql-test/suite/funcs_1/r/memory_func_view.result:
  Updated results
mysql-test/suite/funcs_1/r/myisam_func_view.result:
  Updated results
mysql-test/suite/pbxt/r/func_str.result:
  Updated error numbers
mysql-test/suite/pbxt/r/type_newdecimal.result:
  Updated error numbers
mysql-test/valgrind.supp:
  Added suppression for warning on Work (OpenSuse 11.3 64 bit)

mysql-test/r/subselect4.result:
  Moved test case for LP BUG#718593 into the correct test file subselect_mat_cost_bugs.test.
mysql-test/t/subselect4.test:
  Moved test case for LP BUG#718593 into the correct test file subselect_mat_cost_bugs.test.

unix_timestamp() and time_to_sec() are hybrid items,
  returning integer or double depending on the argument.

extra/comp_err.c:
  Allow one to have multiple start-error-numbers in the same error.txt file.
  Generate 'empty' error strings for the missing error numbers in the errmsg.sys file
mysql-test/r/bigint.result:
  Update results to use new error numbers
mysql-test/r/dyncol.result:
  Update results to use new error numbers
mysql-test/r/func_math.result:
  Update results to use new error numbers
mysql-test/r/func_str.result:
  Update results to use new error numbers
mysql-test/r/plugin.result:
  Update results to use new error numbers
mysql-test/r/table_options.result:
  Update results to use new error numbers
mysql-test/r/type_newdecimal.result:
  Update results to use new error numbers
mysql-test/r/warnings.result:
  Update results to use new error numbers
mysql-test/suite/vcol/r/vcol_ins_upd_innodb.result:
  Update results to use new error numbers
mysql-test/suite/vcol/r/vcol_ins_upd_myisam.result:
  Update results to use new error numbers
mysql-test/suite/vcol/r/vcol_misc.result:
  Update results to use new error numbers
sql/derror.cc:
  Ensure we don't read a errmsg.sys with a missing required error message;  This change was needed as errmsg.sys may now contain empty error messages between the MySQL and MariaDB error messages.
  If error message file didn't exist and we have not read one in the past, don't continue.
  Give better error message if the errmsg.sys header has changed.
sql/share/errmsg.txt:
  Create new section, starting from 1900, for MariaDB error messages

Ensure we don't read a MariaDB 5.3 errmsg.sys file or new errmsg.sys file with holes for not used error messages

sql/derror.cc:
  Ensure we don't read a MariaDB 5.3 errmsg.sys file with moved error messages or a new errmsg.sys file with holes for not used error messages
  If error message file didn't exist and we have not read one in the past, don't continue.
  Give better error message if the errmsg.sys header has changed.

Fields belonging to views in general cannot be substituted for 
equal items, in particular for constants, because all references
to a view field refer to the same Item_field object while they 
could be used in different OR parts of the where condition and
belong to different equivalence classes (to different Item_equals).
That's why substitution for equal items in any context is allowed
only in place of Item_direct_view_ref objects, but not in place of
Item_fields these objects refer to.
Due to some erroneous code in the patch for bug 717577 substitution
for view fields were allowed in some context.This could lead
to wrong results returned by queries using views.

The fix prohibits substitution of view fields for equal items 
in any context.

The patch also changes slightly the compile method for the Item_func
class. Now if the analyze method returns NULL in his parameter the
compile method is not called for the arguments of the function
at all. A similar change was made for the Item_ref class.     

- Fix CRLF end of lines, use LF instead

- in advance_sj_state(), remember join->cur_dups_producing_tables in 
  pos->prefix_dups_producing_tables *before* we modify it, so that 
  restore_prev_sj_state() restores cur_dups_producing_tables in all cases.
- Updated test results in subselect_sj2[_jcl6].result (the original EXPLAIN
  was invalid there)

  TIMESTAMP -> TIMESTAMP(6)
  TIME -> TIME(6)
in general_log and slow_log tables.

include/my_sys.h:
  use constants

sql/event_parse_data.cc:
  don't use "not_used" variable
sql/item_timefunc.cc:
  Item_temporal_func::fix_length_and_dec()
  and other changes
sql/item_timefunc.h:
  introducing Item_timefunc::fix_length_and_dec()
sql/share/errmsg.txt:
  don't say "column X" in the error message that used not only for columns