lp:933959 Assertion `0' failed in net_end_statement(THD*) on concurrent SELECT FROM I_S.INNODB_SYS_INDEXES and ALTER TABLE

Workaround: report a generic error if an I_S plugin failed silently.

use vsnprintf()
use write() on windows, not WriteFile or fwrite()
localtime_r is still a problem

This bug was introduced into mariadb 5.2 in the December 2010 with
the patch that added a new engine property: the ability to support
virtual columns.    
As a result of this bug the information from frm files for tables 
that contained virtual columns did not appear in the information schema
tables.

Added test case for lp:905782 "Assertion `pageno < ((1ULL) << 40)' failed at ma_pagecache.c:3438: pagecache_read or table corruption on INSERT into a ucs2 table"
The orignal bug has been fixed earlier

If in the where clause of the a query some comparison conditions on the
field under a MIN/MAX aggregate function contained constants whose sizes
exceeded the size of the field then the query could return a wrong result
when the optimizer had chosen to apply the MIN/MAX optimization.
With such conditions the MIN/MAX optimization still could be applied, yet
it would require a more thorough analysis of the keys built to find
the value of MIN/MAX aggregate functions with index look-ups.   
The current patch just prohibits using the MIN/MAX optimization in this
situation.

Fixed detection of installed HeidiSQL in the machine, prevent installing own copy if HeidiSQL is already installed.

On deinstallation, do not remove settings if official HeidiSQL is detected.

Move ucs2 test in separate file (MDEV-167).

The issue was that Aria allowed too long keys to be created (so that the internal buffer was not big enough to hold the whole key).
Key lengths is now limited to HA_MAX_KEY_LENGTH (1000), as for MyISAM.
Fixed failure in  "_ma_apply_redo_index: Assertion `new_page_length == 0", as found by buildbot.

mysql-test/suite/maria/r/maria.result:
  Updated results
mysql-test/suite/maria/r/maria3.result:
  Updated results. Added test for bug fix
mysql-test/suite/maria/t/maria3.test:
  Updated results. Added test for bug fix
mysql-test/suite/maria/t/optimize.test:
  Updated test for new max key length
storage/maria/ha_maria.cc:
  Limit key to HA_MAX_KEY_LENGTH.
storage/maria/ma_key_recover.c:
  Limit used page length to max page size (this is in line with the code that writes the entry to the log).
  This fixes failure in  "_ma_apply_redo_index: Assertion `new_page_length == 0", as found by buildbot.
storage/maria/ma_search.c:
  Extra DBUG
storage/maria/ma_write.c:
  Added test to detect errors earlier.

The field key_cache_mem_size of the KEY_CACHE structure must be
initialized in the function init_key_cache() and updated in the
function resize_key_cache().

Cause of the bug is uninitialized items before evaluation HAVING clasue in case of empty result.

Problem was a crash in internal temporary (Maria) files when row length exceeded 65535

mysql-test/suite/maria/r/maria3.result:
  Added test case
mysql-test/suite/maria/t/maria3.test:
  Added test case
storage/maria/ma_open.c:
  Added support for row length > 65535.
  This fixes crash when using tables with longer row lengths.

the mysql-5.6 code line.

mysql-test/suite/innodb_plugin/t/innodb_gis.test:
  Don't run test if innodb_plugin isn't used.

sql/signal_handler.cc:
  Added missing signal values.

Fixed supression in mysql-test-run so it also works on windows.

mysql-test/mysql-test-run.pl:
  Fixed supression so it also works on windows.
mysql-test/valgrind.supp:
  More general handling of memory loss in dlclose (backported from 5.2)
sql/signal_handler.cc:
  Added newlines around link to how to do bug reports

"safe exception patch".
Remove misleading comments suggesting about signal() Windows, the routine here
is part of a exception handler, and sig parameter is an exception code.

Fixed README with link to source
Merged InnoDB change to XtraDB

README:
  Added information of where to find MariaDB code
storage/archive/ha_archive.cc:
  Removed memset() of rows, a MariaDB checksum's doesn't touch not used data.

This happend when you have more than 1024 open Aria tables during checkpoint.


mysql-test/mysql-test-run.pl:
  Fixed that variable names are consistent between external and internal server.
mysql-test/suite/maria/suite.pm:
  Test for aria-block-size instead of 'aria' as 'aria' is not set for embedded server.
  This should be ok for aria tests, as aria is never disabled for these.
storage/maria/ma_checkpoint.c:
  Fixed bug when there are more than 1024 open Aria tables during checkpoint.

The bug was fixed with the code back-ported from the patch for LP bug 800184
pushed into mariadb-5.3.