Port to mariadb-1.0 the following fix from mysql-5.6:

  Revision ID: jorgen.loland@oracle.com-20120314131055-ml54x9deueqfsff4
  BUG#13701206: WHERE A>=B DOES NOT GIVE SAME EXECUTION PLAN
                AS WHERE B<=A (RANGE OPTIMIZER)
 
that fix didn't have a public testcase, so I created one.

which has been removed earlier, but somehow got into the sources again.

This file is not really needed, and it prints warnings
"sys/timeb.h is deprecated" for every file when compiling on FreeBSD.

ltime.time_type == MYSQL_TIMESTAMP_NONE ||
mysql_type_to_time_type(cached_field_type) == ltime.time_type'
fails with IF, ISNULL, ADDDATE

* roles.grant_proxy-5526 test for --embedded
* gcc warning in Connect

Cleanups:
* remove unused HA_EXTRA_EXPORT (can be added later if needed, e.g. for Aria)
* clarify the meaning of HA_CAN_EXPORT
* make all engines that support EXPORT to announce it
* reduce code duplication

Syntax. Server support. Test cases.
InnoDB bugfixes:
* don't mess around with system sprintf's, always use my_error() for errors.
* don't use InnoDB internal error codes where OS error codes are expected.
* don't say "file not found", when it was.

only let filesort() count rows for SQL_CALC_ROWS if it's using priority queue

Update InnoDB to 5.6.14
Apply MySQL-5.6 hack for MySQL Bug#16434374
Move Aria-only HA_RTREE_INDEX from my_base.h to maria_def.h (breaks an assert in InnoDB)
Fix InnoDB memory leak

 SET(CMAKE_INCLUDE_DIRECTORIES_PROJECT_BEFORE ON)
to find header files from the bundled libraries
(jemalloc, yassl, readline, pcre, etc)
before the ones installed in the system.

Use Breaks: not Conflicts:

don't add entries to acl_roles_mappings hash for non-existing grantees.

recognize the context better:
always treat the barename as a username in the username context

use 'user_name' for the error message (fixed, after get_current_user()),
not the original tmp_user_name, as it comes from the parser (host == NULL).

set_role::light_check() was incorrect

on server shutdown after SELECT with CONVERT_TZ

It's wrong to return my_empty_string from val_str().
Removing my_empty_string. Using make_empty_result() instead.