Patch from Daniel Black:
- Change the charset of mysql.column_stats.{min_value, max_value} from
  utf8_bin varchar to varbinary
- Adjust the code that saves/reads the data accordingly.
- Also provide upgrade statement in mysql_system_tables_fix.sql

pre/CMakeLists.txt defines CMAKE_DEBUG_POSTFIX which causes a different
library name on Windows debug build (pcred.lib rather than pre.lib)
However MERGE_LIBRARIES macro that is used to create static embedded
library (out of other static libraries), can  not handle per-configuration
library names. Thus the build fails with "pre.lib not found"

Fix is to remove unnecessary CMAKE_DEBUG_POSTFIX

Fix build failures caused by new C runtime library
- isnan, snprintf, struct timespec are now defined, attempt to
redefine them leads
- P_tmpdir, tzname are no more defined
-  lfind() and lsearch() in lf_hash.c had to be renamed,  declaration
conflicts with some C runtime functions with the same name declared in
a header included by stdlib.h

 Also fix couple of annoying warnings :
- remove #define NOMINMAX from config.h to avoid "redefined" compiler
warnings(NOMINMAX is already in compile flags)

- disable incremental linker in Debug as well (feature not used much
and compiler crashes often)


Also simplify package building with Wix, require Wix 3.9 or later
(VS2015 is not compatible with old Wix 3.5/3.6)

When compiled with "-Wl,-Bsymbolic-functions" flags
(e.g. when building a .deb package on Ubuntu) with TokuDB and jemalloc,
mysqld crashed in toku_get_processor_frequency_cpuinfo() when
free()-ing a buffer returned by getline().
getline() uses libc malloc() internally, while free() is aliased
to jemalloc's free() in this configuration.
Fixing not to use getline(). Using a static buffer instead.

Make unique table check after setup_fields of update because unique table can materialize table and we do not need field resolving after materialization.

Replaced my_connect() with cross-plattform, timeout aware
vio_socket_connect() function

The regression is caused by change bind-address server parameter
in MDEV-8083, so now server listens on IPv4 only by default.

The problem however is that on Windows, connection to server on localhost
appears to be much faster, if server listens on IPv6/dual stack.
mysql_real_connect() would try to connect to IPv6 loopback  first,
and if this fails, the failing connect() call takes several seconds.

To fix, use bind-address=* on Windows, and 127.0.0.1 elsewhere

MDEV-8913 Derived queries with same column names as final projection causes issues when using Order By

find_item_in_list() now recognize view fields like a fields even if they rever to an expression.
The problem of schema name do not taken into account for field with it and
derived table fixed.
Duplicating code removed

(with ENABLED_PROFILING=ON, field.h was included indirectly
from sql_profile.h)

A few tests assumes that the CYCLE timer is always available,
which is not true on some platforms (e.g. ARM).
Fixing the tests not to reply on the CYCLE availability.

use table_alias_charset for comparing table names, not files_charset_info

Item_direct_view_ref maintains its own item_const() method so should use it when asked of temporary table field to be in sync with it.

Non-select-like queries has no correct JOIN structure connected to top-most SELECT_LEX (and should not).

MDEV-7930 Assertion `table_share->tmp_table != NO_TMP_TABLE || m_lock_type != 2' failed in  handler::ha_index_read_map

In optimizing aggregate function do not try to touch tables from outer
query.

            ha_partition::init_record_priority_queue()

Cherry-pick rev.6b0ee0c795499cee7f9deb649fb010801e0be4c2 from mysql-5.6.

Bug #18305270  BACKPORT BUG#18694052 FIX
               FOR ASSERTION `!M_ORDERED_REC_BUFFER'
               FAILED TO 5.6

PROBLEM
-------
Missed to remove record priority queue if
init_index failed for a partition which
was causing the crash.

FIX
---
Remove priority queue if init_index fails
for partition.

In buffer pool read hit rate calculation can lead rate that is
less than zero.

Analysis: Current implementation will write and read at least one block
(sort_buffer_size bytes) from disk / index even if that block does not
contain any records.

Fix: Avoid writing / reading empty blocks to temporary files (disk).

Since MariaDB packages have absolute paths, they are marked as not relocatable
by setting CPACK_RPM_PACKAGE_RELOCATABLE. According to logics of recent CPackRPM
it is not enough: one needs to set CPACK_PACKAGE_RELOCATABLE additionally.

mysql_secure_installation used incorrect path while looking up for "mysql"
client tool: $basedir/$basedir/bin instead of $basedir/bin.

This patch adapts "my_print_defaults" lookup algorithm for "mysql" client tool.

MDEV-8358 ALTER TABLE .. ADD PRIMARY KEY IF NOT EXISTS -> ERROR 1068 (42000): Multiple primary key defined
        Checks for multiple primary keys added.

Author: Marc Alff <marc.alff@oracle.com>
Date:   Thu Jul 30 11:17:50 2015 +0200

    Bug#21528683 SLOWDOWN CAUSED BY MEMSET IN SQL_DIGEST_STORAGE.RESET()

use CHECK_C_SOURCE_COMPILES for atomic tests if cross-compiling
(continue to use CHECK_C_SOURCE_RUNS otherwise)

Assertion `inited==INDEX' failed in int handler::ha_index_first(uchar*)

The crash was because errors from init_read_record_idx() was not taken care of.

don't abort with "XtraDB not supported" if XtraDB was disabled
in this build.

add a run-time check for jemalloc >= 2.3

don't forget to re-examine the current element when updating a HASH

strip endspaces from the role name in the parser
because they'll be lost anyway when the name is stored
in the mysql.user.user column (of type CHAR)

allow SET PASSWORD from  bootstrap and init-file

  modified:   storage/connect/tabodbc.cpp

new features:
set event_scheduler=ON|OFF will now try to init event scheduler
if it's not enabled
set event_scheduler=default will try to enable it based on
the value of the event_scheduler when mysqld was started