cherry-pick the upstream fix

commit d4ba10184cd7bde9c31c610e664ecd0c93605c46
Author: Sujatha Sivakumar <sujatha.sivakumar@oracle.com>
Date:   Wed Jul 2 11:34:11 2014 +0530

    Bug#17453826:ASSERTION ERROR WHEN SETTING FUTURE BINLOG
    FILE/POS WITH SEMISYNC

    Problem:
    ========
    When DMLs are in progress on the master stopping a slave and
    setting ahead binlog name/pos will cause an assert on the
    master.
    ...

Item_func::print() prints itself as name + "(" + arguments + ")".
Normally that works, but Item_func_interval internally implements its
arguments as one single Item_row. Item_row prints itself as
"(" + values + ")". As a result, "INTERVAL(1,2)" was being printed
as "INTERVAL((1,2))". Fixed with a custom Item_func_interval::print().

Removed 'galera-sst-mode' option from mysqldump as its no longer needed.

only activate it on MYSQL_MAINTAINER_MODE=ERRON

* oqgraph is in a separate package in 10.0
* sphinx udf is in the ha_sphinx.so

Enable subquery materialization for non-SELECT queries with a SELECT part

Redefine FT_KEYPART in a way that it does not conflict with Hash Join.
Hash join stores field->field_index in KEYUSE::keypart, so we must
use a value of FT_KEYPART that's greater than MAX_FIELDS.

Start the client API for low-level protocol access:
* unsigned long mysql_net_read_packet(MYSQL *mysql);
* unsigned long mysql_net_field_length(unsigned char **packet);

* fix /etc/init.d/mysql to use log-basename for pid-filename
* fix mysqld_safe not to force logging-to-file when log-basename is specified

include oqgraph into deb packages conditionally, just like we do with tokudb

Do not use merge_for_insert for commands which use SELECT because optimizer can't work with such tables.

Fixes which makes multi-delete working with normally merged views.

    When the distance in ST_BUFFER is too far negative the coordinates can run out of the operational
    area. We should just return an empty geometry in this case.

The testcase fails randomly due to ibuf merge happening in the background.
Fix not to do any merges with ibuf_debug enabled.

Previously IF NOT EXISTS was added in Debian version in revno 3543. 
Now added the same for Ubuntu.

MDEV-7435 Windows debug: Run-Time Check Failure #3 - The variable 'unused' is being used without being initialized.
Fixed as it's done in 10.0.

causes server crash

Analysis: If wrong data types used on foreign constraint there
was possibility that foreign->id is NULL when incorrect
foreign constraint was removed from the dictionary cache.

Fix: Add guard foreign->id != NULL before trying to lookup
or remove the foreign constraint from dictionary cache.

Tested using user database where problem was repeatable.

MDEV-7055: MySQL#74664 - InnoDB: Failing assertion: len <= col->len || col->mtype == 5 || (col->len == 0 && col->mtype == 1) in file rem0rec.cc line 845

Debug assertion maybe too strict.

Analysis: Purge thread does not have thd and no access to
handlerton.

Fix: If thd does not exists we use sql_print_warning instead
of push_warning_printf.

use the old registry branch, even if we changed the "manufacturer" string

added a script to regenerate certificates easily in the future (2035!)
restored server8k-key.pem to actually be 8K key, as it was supposed to