MDEV-9643: Don't emit any "deb-systemd-helper not found" warnings

Index access becomes range every once in a while. Masked the value in addition
to other already masked columns

on FreeBSD 10 jemalloc is in libc, no separate libjemalloc is needed

this simplifies merging of MySQL and TokuDB

"#include <math.h>" has "#define isfinite(X) ..."
while "#include <cmath>" does "#undef isfinite"

in -std=c++11 mode <cmath> is included, we need a workaround
to provide a usable isfinite()

            configured withtout username

Federated/spider/connect engines or replication threads connecting to other host
with empty user name may crash mysqld.

This is addition to original patch, which adds a test case and amends a macro.

This reverts commit 13884cf2.

Fixed in 5.6 (merged in the next commit)

At least on Linux test fails because too small buffer pool.

  from catalog functions and tables. It does now and when decimal
  is NULL defines DOUBLE without parameters.
  modified:   storage/connect/ha_connect.cc
  modified:   storage/connect/mysql-test/connect/r/odbc.result
  modified:   storage/connect/mysql-test/connect/r/odbc_oracle.result
  modified:   storage/connect/mysql-test/connect/r/odbc_postgresql.result
  modified:   storage/connect/mysql-test/connect/r/odbc_sqlite3.result
  modified:   storage/connect/mysql-test/connect/r/odbc_xls.result
  modified:   storage/connect/odbconn.cpp
  modified:   storage/connect/table.cpp
  modified:   storage/connect/valblk.h

Add check to avoid NULL-pointer access and added warning if share->ib_table
is not what expected.

MDEV-9469: 'Incorrect key file' on ALTER TABLE

InnoDB needs to rebuild table if column name is changed and
added index (or foreign key) is created based on this new
name in same alter table.

"x86_64" is "amd64" on FreeBSD

mysql.cc:
Unlike the main MYSQL structure, kill_mysql did not have MYSQL_OPT_PROTOCOL set.

Move all connection-related settings to a separate function and
use it both for the main MYSQL and for kill_mysql.

MDEV-9390 Function found_rows() gives incorrect result where the previous SELECT contains ORDER BY clause

use the raw found_rows value only when SQL_CALC_FOUND_ROWS was specified

following InnoDB's logic, altering a comment or a default
field's value needs "NO_LOCK", not EXCLUSIVE

Only set Alter_inplace_info::ALTER_COLUMN_VCOL flag if
a vcol might be affected by the ALTER TABLE statement

Followup fix for bug#35074: update the second location where
max_used_connections is calculated (to be like the
first one).

fix a few cases where a successful ALTER was not binlogged:
* on errors after the completed ALTER, binlog it, then return an error
* don't let thd->killed abort open_table() after completed
  online ALTER.

Fix the doubly questional fix for MySQL Bug#17250787:
* it detected autoinc index by looking for the first index
  that starts from autoinc column. never mind one column
  can be part of many indexes.
* it used autoinc_field->field_index to look up into internal
  innodb dictionary. But field_index accounts for virtual
  columns too, while innodb dictionary ignores them.

Find the index by its name, like elsewhere in ha_innobase.

don't use ipv6 is the check fails for any reason. for example, an
ancient solaris perl didn't have sockaddr_in6() in Socket at all.

it caused feedback plugin tests to fail

1. ignore generated dtrace files
2. don't rewrite probes_mysql_nodtrace.h in-place