Updated mtr files to support different compiled in options

This allows one to run the test suite even if any of the following
options are changed:
- character-set-server
- collation-server
- join-cache-level
- log-basename
- max-allowed-packet
- optimizer-switch
- query-cache-size and query-cache-type
- skip-name-resolve
- table-definition-cache
- table-open-cache
- Some innodb options
etc

Changes:
- Don't print out the value of system variables as one can't depend on
  them to being constants.
- Don't set global variables to 'default' as the default may not
  be the same as the test was started with if there was an additional
  option file. Instead save original value and reset it at end of test.
- Test that depends on the latin1 character set should include
  default_charset.inc or set the character set to latin1
- Test that depends on the original optimizer switch, should include
  default_optimizer_switch.inc
- Test that depends on the value of a specific system variable should
  set it in the test (like optimizer_use_condition_selectivity)
- Split subselect3.test into subselect3.test and subselect3.inc to
  make it easier to set and reset system variables.
- Added .opt files for test that required specfic options that could
  be changed by external configuration files.
- Fixed result files in rockdsb & tokudb that had not been updated for
  a while.

mysql-test/r/variables.result

@@ -27,7 +27,8 @@ set @my_thread_cache_size         =@@global.thread_cache_size;
 set @my_max_allowed_packet        =@@global.max_allowed_packet;
 set @my_delay_key_write           =@@global.delay_key_write;
 set @my_join_buffer_size          =@@global.join_buffer_size;
-set @my_log_warnings               =@@global.log_warnings;
+set @my_log_warnings              =@@global.log_warnings;
+set @my_local_infile              =@@global.local_infile;
 set @`test`=1;
 select @test, @`test`, @TEST, @`TEST`, @"teSt";
 @test	@`test`	@TEST	@`TEST`	@"teSt"
@@ -522,9 +523,6 @@ Warning	1292	Truncated incorrect max_heap_table_size value: '100'
 set max_join_size=100;
 set max_sort_length=100;
 set global max_user_connections=100;
-select @@max_user_connections;
-@@max_user_connections
-100
 set global max_write_lock_count=100;
 set myisam_sort_buffer_size=100;
 Warnings:
@@ -648,13 +646,14 @@ select * from information_schema.global_variables where variable_name like 'myis
 VARIABLE_NAME	VARIABLE_VALUE
 MYISAM_MAX_SORT_FILE_SIZE	MAX_FILE_SIZE
 set global myisam_max_sort_file_size=default;
+set @@global.max_user_connections=10, @@local.max_join_size=1000;
 select @@global.max_user_connections,@@local.max_join_size;
 @@global.max_user_connections	@@local.max_join_size
-100	100
+10	1000
 set @svc=@@global.max_user_connections, @svj=@@local.max_join_size;
 select @@global.max_user_connections,@@local.max_join_size;
 @@global.max_user_connections	@@local.max_join_size
-100	100
+10	1000
 set @@global.max_user_connections=111,@@local.max_join_size=222;
 select @@global.max_user_connections,@@local.max_join_size;
 @@global.max_user_connections	@@local.max_join_size
@@ -666,12 +665,13 @@ select @@global.max_user_connections,@@local.max_join_size;
 set @@global.max_user_connections=@svc, @@local.max_join_size=@svj;
 select @@global.max_user_connections,@@local.max_join_size;
 @@global.max_user_connections	@@local.max_join_size
-100	100
+10	1000
 set @a=1, @b=2;
 set @a=@b, @b=@a;
 select @a, @b;
 @a	@b
 2	1
+set @@global.max_user_connections=@my_max_user_connections;
 set @@global.global.key_buffer_size= 1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'key_buffer_size= 1' at line 1
 set GLOBAL global.key_buffer_size= 1;
@@ -1061,12 +1061,13 @@ set global net_write_timeout         =@my_net_write_timeout;
 set global net_read_timeout          =@my_net_read_timeout;
 set global server_id                 =@my_server_id;
 set global slow_launch_time          =@my_slow_launch_time;
-set global default_storage_engine            =@my_storage_engine;
+set global default_storage_engine    =@my_storage_engine;
 set global thread_cache_size         =@my_thread_cache_size;
-set global max_allowed_packet        = default;
+set global max_allowed_packet        =@my_max_allowed_packet;
 set global delay_key_write           =@my_delay_key_write;
 set global join_buffer_size          =@my_join_buffer_size;
 set global log_warnings              =@my_log_warnings;
+set global local_infile              =@my_local_infile;
 show global variables where Variable_name='table_definition_cache';
 Variable_name	Value
 table_definition_cache	#
@@ -1136,12 +1137,12 @@ ERROR HY000: Variable 'ft_stopword_file' is a read only variable
 #
 SHOW VARIABLES like 'back_log';
 Variable_name	Value
-back_log	80
+back_log	#
 SELECT @@session.back_log;
 ERROR HY000: Variable 'back_log' is a GLOBAL variable
-SELECT @@global.back_log;
-@@global.back_log
-80
+SELECT @@global.back_log > 0;
+@@global.back_log > 0
+1
 SET @@session.back_log= 7;
 ERROR HY000: Variable 'back_log' is a read only variable
 SET @@global.back_log= 7;
@@ -1492,12 +1493,12 @@ SET GLOBAL max_binlog_cache_size = @old_max_binlog_cache_size;
 #
 # Bug #37168 : Missing variable - skip_name_resolve
 #
-SELECT @@skip_name_resolve;
-@@skip_name_resolve
-0
+SELECT @@skip_name_resolve >= 0;
+@@skip_name_resolve >= 0
+1
 SHOW VARIABLES LIKE 'skip_name_resolve';
 Variable_name	Value
-skip_name_resolve	OFF
+skip_name_resolve	#
 #
 # Bug #43233 : Some server variables are clipped during "update,"
 #              not "check" stage
@@ -1531,9 +1532,9 @@ SET @@global.max_binlog_cache_size=DEFAULT;
 SET @@global.max_join_size=DEFAULT;
 SET @@global.key_buffer_size=@kbs;
 SET @@global.key_cache_block_size=@kcbs;
-select @@max_long_data_size;
-@@max_long_data_size
-16777216
+select @@max_long_data_size > 0;
+@@max_long_data_size > 0
+1
 #
 # Bug#11766424  59527:
 # Assert in DECIMAL_BIN_SIZE: