Make role statements work with the PREPARE keyword.

Code was assuming that the keys file would contain at least one valid
key. This caused a Dynamic_array::at(0) call that lead to the crash.

 LOG-SLOW-SLAVE-STATEMENTS NOT DISPLAYED.

        These parameters were moved from the command line options to
        the system variables section. Treatment of the
        opt_log_slow_slave_statements changed to let the
        dynamic change of the variable.

    Problem was that link file (.isl) is also opened using O_DIRECT
    mode and if this fails the whole create table fails on internal
    error.

    Fixed by not using O_DIRECT on link files as they are used only
    on create table and startup and do not contain real data.
    O_DIRECT failures are successfully ignored for data files
    if O_DIRECT is not supported by file system on used
    data directory.

delete deferred events after they're executed
(otherwise they can be executed again for a sub-statement)

See also
commit 0e78d1d
Author: Venkatesh Duggirala <venkatesh.duggirala@oracle.com>
Date:   Wed Mar 20 11:20:47 2013 +0530

    BUG#15850951-DUPLICATE ERROR IN REPLICATION WITH SLAVE
    TRIGGERS AND AUTO INCREMENT

When acting as a Galera receiver node, server startup may take
more than 30 secs (the current default) as it has to wait for
SST/IST operation to complete besides spending some time doing
wsrep recovery.

Fixed by raising the default value of MYSQLD_STARTUP_TIMEOUT
to 60 secs. Also sourced /etc/default/mariadb into the init
script so that it can be used to set MYSQLD_STARTUP_TIMEOUT.

Post-fix: initialize err

Enable replication of CREATE/ALTER/DROP SERVER statements
in Galera cluster.

Allowing assigning of DECIMAL(N,0) values to INT-alike system variables.

10.1 part of the fix

10.0 part of the fix

MDEV-9590: Always print "Engine-independent statistic" warnings and might be filtering columns unintentionally from engines

Do not issue the warning in case we are not going to collect the statistics.

update main.delayed test after 38b89a61
ALTER TABLE ... COMMENT is no longer blocking,
use a different ALTER TABLE variant.

Fixed more cases for MDEV-6282

don't strcpy a string to itself

s/Execute/Query/ to account for --ps-protocol

typo. the code was not matching the comment

fix a buffer overflow in extension_based_table_discovery
(that only happens in debug builds)

Remove Linuxism. 

Works fine with a POSIX-compat shell

don't crash in debug builds. issue an error message on corrupt event

MariaDB-server-10.1 should obsolete MariaDB-Galera-server

Based on this commit into MySQL-5.7:
> commit 8e51b845aafc8b4cdebd763c8aebda262ac2d4cd
> Author: Guilhem Bichot <guilhem.bichot@oracle.com>
> Date:   Mon Nov 4 15:44:55 2013 +0100
>
>    Bug#13944462 'NULL IN (XX)' RETURNS WRONG RESULTS

when creating shadow nullable fields, preserve all
original field flags (because we swap flags
back and forth in not_null_fields_have_null_values())

in particular, don't do ExternalProject_Add()
that starts creating build directories for a disabled
plugin

MDEV-9739 Assertion `m_status == DA_ERROR || m_status == DA_OK' failed in Diagnostics_area::message() ; connect.xml* tests fail in buildbot

  modified:   storage/connect/value.cpp

- Fix compile error of MDEV-9603
  modified:   storage/connect/tabmysql.cpp

don't fail if cracklib_password_check is statically compiled in