to 16384 (MDEV-5393)

modified:
  storage/connect/odbconn.cpp

- Fix sorting catalog table result set (MDEV-5394)

added:
  storage/connect/mysql-test/connect/r/xml_mdev5261.result
  storage/connect/mysql-test/connect/t/xml_mdev5261.test
modified:
  storage/connect/mysql-test/connect/r/odbc_sqlite3.result
  storage/connect/mysql-test/connect/t/odbc_sqlite3.test
  storage/connect/table.cpp
  storage/connect/tabodbc.cpp
  storage/connect/xtable.h

- Remove unnecessary closing of opened table in rnd_init

modified:
  storage/connect/ha_connect.cc

running against a data source with many tables

modified:
  storage/connect/odbconn.cpp

modified:
  storage/connect/ha_connect.cc

modified:
  storage/connect/ha_connect.cc
  storage/connect/mycat.cc
  storage/connect/mycat.h

modified:
  storage/connect/tabutil.cpp
  
- Fix test results to reflect the fact that in discovery, column defaults
  are now retrieved for the MYSQL table type.

modified:
  storage/connect/mysql-test/connect/r/mysql_discovery.result
  storage/connect/mysql-test/connect/r/mysql_new.result

- Restore Unix line endings

modified:
  storage/connect/value.cpp

added:
  storage/connect/mysql-test/connect/r/unsigned.result
  storage/connect/mysql-test/connect/t/unsigned.test
modified:
  storage/connect/colblk.cpp
  storage/connect/colblk.h
  storage/connect/connect.cc
  storage/connect/ha_connect.cc
  storage/connect/myconn.cpp
  storage/connect/mysql-test/connect/r/mysql_discovery.result
  storage/connect/mysql-test/connect/r/xml.result
  storage/connect/myutil.cpp
  storage/connect/myutil.h
  storage/connect/plgdbsem.h
  storage/connect/tabdos.cpp
  storage/connect/tabfix.cpp
  storage/connect/tabmysql.cpp
  storage/connect/tabutil.cpp
  storage/connect/valblk.cpp
  storage/connect/valblk.h
  storage/connect/value.cpp
  storage/connect/value.h
  storage/connect/xobject.cpp
  storage/connect/xobject.h

Applied a patch from Philip Hazel implementing the non-standard
syntax for word boundaries in PCRE, for compatibility with the
old Henry Spencer's regex library.

modified:
  storage/connect/valblk.cpp

modified:
  storage/connect/ha_connect.cc
  storage/connect/value.cpp

- Fix the way GetPlug works (was not updating xp)

modified:
  storage/connect/ha_connect.cc

modified:
  storage/connect/odbconn.cpp

- Prepare Value and Valblk to support unsigned data types
  (not operational yet)

modified:
  storage/connect/colblk.cpp
  storage/connect/filamvct.cpp
  storage/connect/myconn.cpp
  storage/connect/plgdbutl.cpp
  storage/connect/tabdos.cpp
  storage/connect/tabodbc.cpp
  storage/connect/tabvct.cpp
  storage/connect/valblk.cpp
  storage/connect/valblk.h
  storage/connect/value.cpp
  storage/connect/value.h
  storage/connect/xindex.cpp

            MariaDB 10.0 server

modified:
  storage/connect/ha_connect.cc
  storage/connect/myconn.cpp
  storage/connect/myutil.cpp
  storage/connect/odbccat.h
  storage/connect/odbconn.cpp
  storage/connect/tabmysql.cpp

- Add tests on new MYSQL features

added:
  storage/connect/mysql-test/connect/my.cnf
  storage/connect/mysql-test/connect/r/mysql_discovery.result
  storage/connect/mysql-test/connect/r/mysql_exec.result
  storage/connect/mysql-test/connect/r/mysql_new.result
  storage/connect/mysql-test/connect/t/myconn.inc
  storage/connect/mysql-test/connect/t/myconn_cleanup.inc
  storage/connect/mysql-test/connect/t/mysql_discovery.test
  storage/connect/mysql-test/connect/t/mysql_exec.test
  storage/connect/mysql-test/connect/t/mysql_new.test

Analysis: In earlier MySQL 5.6 versions this table innodb_index_stats  used to have a foreign key referencing to innodb_table_stats. However, in newer MySQL 5.6 versions this foreign key is removed and if you upgrade, your innodb_table_stats is created by the earlier mariadb version, thus a newer version will complain that the table is incorrectly defined.

Added drop foreign key on mysql_system_tables_fix.sql to be executed on mysql_upgrade.

Fixed the following compilation errors and test failures:
- maria SE: "stage_waiting_for_a_resource" wasn't declared w/o PFS
- sql_repl.h: PSI_mutex_key is not available in non-PFS builds
- mysqld.cc: pfs_param is not available in non-PFS builds
- mysqld.cc: init_show_explain_psi_keys() is not available in non-PFS builds
- mysqld.cc: call net_before_header_psi, net_after_header_psi even if PFS
  is not available so that thread enters stage_init at proper time. Fixes
  sp-threads and a few tests in funcs_1.
- myisam_file_io.opt: added missing loose prefix

        Added the IF NOT EXISTS option to the CONSTRAINT keyword.

MDEV-5248 Serious incompatibility and data corruption of DATETIME and DATE types due to get_innobase_type_from_mysql_type refactor combined with InnoDB Online DDL

restore old innodb get_innobase_type_from_mysql_type() function,
record all mysql_type->innodb_type mapping
(as generated by mysql-5.6).
add safety code to disable online alter when internal types don't match

storage/innobase/dict/dict0stats.cc:
  revert to 5.6 state

correct bugs in mysql_system_tables_fix.sql.
Update system_mysql_db_fix* tests

Patch by Elena.

Move the table creation to the end of the file, so
mysql.innodb_stats_table has been created and the statement
does not fail.

Apply fix suggested by Igor:
- When eliminate_item_equal() generates pair-wise equalities from a 
  multi-equality,  do generate a "bridge" equality between the first 
  field inside SJM nest and the field that's first in the overall multi-equality.

  and MYSQL CONNECT tables to take care of kewords such as IGNORE.

modified:
  storage/connect/myconn.cpp
  storage/connect/odbconn.cpp
  storage/connect/tabmysql.cpp
  storage/connect/tabmysql.h
  storage/connect/tabodbc.cpp
  storage/connect/tabodbc.h

MDEV-5113 Wrong result (extra row) and valgrind warnings in Item_maxmin_subselect::any_value on 2nd execution of PS with SELECT subquery

When setting Item_func_not_all::test_sum_item or Item_func_not_all::test_sub_item,
reset the other one to NULL - they can never be set both. When a PS is reexecuted,
different executions might be optimized differently and a wrong test_su*_item
might stay set from the previous execution.

- MIN/MAX optimizer does a check whether a "field CMP const" comparison uses a constant 
  that's longer than the field it is compared to.  Make this check only for string columns,
  also compare character lengths, not byte lengths.

- Address input from the mail list: change how EXPLAIN is 
  formatted in the slow query log.

The used_tables attribute must be recalculated for the HAVING condition
if the condition is applied to the rows read from a temporary table.

allocate thd_proc_info string in thd memroot, not on the stack, so that it
won't be overwritten while another thread might be printing it