During wsrep position recovery, galera_recovery.sh script
redirected mysqld's error log to a temporary file in order
to find the start position. This, however, will not work
if --log-error is configured for the server.

Fixed by using --log-error in command line instead of
redirection.

[Patch contributed by Philippe MARASSE]

The problem was caused by a merged semi-join, which contained a non-merged
semi-join, which used references to the top-level query in the left_expr.

When moving non-merged semi-join from the subquery to its parent, do not
forget to call fix_after_pullout for its Item_subselect. We need to do
that specifically, because non-merged semi-joins do not have their
IN-equality in the WHERE clause at this stage.

Do not set 'optimized' flag until whole optimization procedure is finished.

* MDEV-10294: Put testname into environment as MTR_TEST_NAME during MTR

* MDEV-10294: restructure mtr to allow --valgrind-option=--tool=XXX

* MDEV-10294: mtr valgrind - supressions all tools + feedback

Fixed threadpool_add_connection to use thd_prepare_connection()
to match thread-per-conection flow.

set the 'typelib' member for plugin boolean sysvars

don't call strlen() in the loop

a test case for a broken vcols behavior with different
charsets. this is fixed in 10.2

TABLE_SHARE::init_from_binary_frm_image has a rule: if an index
has a partially-covered column (like in "KEY(col(N))" ), then dont
provide "Extended Keys" feature for this index.

The problem was that due to coding error Extended Keys feature was
disabled for *ALL* subsequent indexes. Fixed the error.

The problem was introduced by 1859caf6:
  MDEV-10175: range optimizer calls records_in_range() for full extended keys

  Make the range optimizer not call records_in_range() when it would
  not give any benefit.

that patch used an incorrect way to check for full extended key. Now fixing
the check.

Add ProtectSystem=full, NoNewPrivileges=true, PrivateDevices=true, and ProtectHome=true to the systemd units.

MDEV-10211 : fix ssl test not to use specific value of ssl_cipher, as it can change between different openssl/yassl version

add a test case

Addreses are not necessarily between heap_start && heap_end. Malloc
calls using mmap can place pointers outside these bounds. In this case,
we'll warn the user that the query pointer is potentially invalid.
However, we'll attempt to print the data anyway after we're done
printing everything else.

MDEV-10318 : Fix crash in embedded, in case prepared statement has parameter placeholders, but does not bind parameters

MDEV-10318 : Fix crash in embedded, in case prepared statement has parameter placeholders, but does not bind parameters

On Solaris mktime() adds one extra day to tm_mday field and returns appropriate
value for dates 1600-01-01 and earlier. That is 1600-01-01 becomes 1600-01-02.

Solaris mktime manual excerpts:
  ...
  The tm_year member must be for year 1901 or later.  Calendar
  times  before  20:45:52  UTC,  December  13,  1901  or after
  03:14:07 UTC,  January 19, 2038 cannot be represented. Port-
  able  applications  should  not  try  to create dates before
  00:00:00 UTC, January 1, 1970 or after 00:00:00 UTC, January
  1, 2038.
  ...
  The  mktime() function assumes Gregorian dates. Times before
  the  adoption  of the Gregorian calendar will not match his-
  torial records.
  ...

According to manual Mroonga only supports dates and datetimes after 1900:
https://mariadb.com/kb/en/mariadb/about-mroonga/

Technically these tests cover unsupported values and should fail on all
platforms. Disable tests until the problem is fixed upstream.

Avoid recursive LOCK_system_variables_hash acquisition in
intern_sys_var_ptr() by pre-syncing dynamic session variables.

-LONGLONG_MIN is the undefined behavior in C.
longlong2decimal() used to do this:

  int longlong2decimal(longlong from, decimal_t *to) {
    if ((to->sign= from < 0))
      return ull2dec(-from, to);
    return ull2dec(from, to);

and later in ull2dec() (DIG_BASE is 1000000000):

  static int ull2dec(ulonglong from, decimal_t *to) {
    for (intg1=1; from >= DIG_BASE; intg1++, from/=DIG_BASE) {}

this breaks in gcc-5 at -O3. Here ull2dec is inlined into
longlong2decimal. And gcc-5 believes that 'from' in the
inlined ull2dec is always a positive integer (indeed, if it was
negative, then -from was used instead). So gcc-5 uses
*signed* comparison with DIG_BASE.

Fix: make a special case for LONGLONG_MIN, don't negate it

The crash was caused by this problem:
get_best_group_min_max() tries to construct query plans for keys that
are not processed by the range optimizer. This wasn't a problem as long
as SEL_TREE::keys was an array of MAX_KEY elements.
However, now it is a Mem_root_array and only has elements for the used
keys, and get_best_group_min_max attempts to address beyond the end of
the array.

The obvious way to fix the crash was to port (and improve) a part of
96fcfcbd7b5120e8f64fd45985001eca8d36fbfb from mysql-5.7. This makes
get_best_group_min_max not to consider indexes that Mem_root_arrays
have no element for.

After that, I got non-sensical query plans (see MDEV-10325 for details).
Fixed that by making get_best_group_min_max to check if the index is in
table->keys_in_use_for_group_by bitmap.

innodb_shutdown_for_mysql in ppc64el on test
case innodb_fts.innodb_fts_stopword_charset.

(MDEV-9407, MDEV-9408) from 10.1

Needed to fix MDEV-10317 easier.

"thd" is available through the "table" argument, as table->in_use.

Backporting (partially) from 10.2.