After-merge fixes

main.selectivity_innodb: Re-record the result.

MDEV-18863: Make wsrep_sst_mariabackup use Bash due to the += syntax.

mysql-test/r/selectivity_innodb.result

@@ -1662,19 +1662,19 @@ explain extended select * from t1 use index () where a in (17,51,5);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	2.97	Using where
 Warnings:
-Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` USE INDEX () where (`test`.`t1`.`a` in (17,51,5))
+Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` USE INDEX () where `test`.`t1`.`a` in (17,51,5)
 explain extended select * from t1 use index () where b=2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	4.76	Using where
 Warnings:
-Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` USE INDEX () where (`test`.`t1`.`b` = 2)
+Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` USE INDEX () where `test`.`t1`.`b` = 2
 # Now, the equality is used for ref access, while the range condition
 # gives selectivity data
 explain extended select * from t1 where a in (17,51,5) and b=2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	ref	b,a	b	5	const	59	2.80	Using where
+1	SIMPLE	t1	ref	b,a	b	5	const	59	2.90	Using where
 Warnings:
-Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 2) and (`test`.`t1`.`a` in (17,51,5)))
+Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`b` = 2 and `test`.`t1`.`a` in (17,51,5)
 drop table t1;
 set use_stat_tables= @save_use_stat_tables;
 set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;

scripts/wsrep_sst_rsync.sh

-#!/bin/sh -ue
+#!/bin/bash -ue
 
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