MDEV-11479 Improved wsrep_dirty_reads

Updated sysvars_wsrep.result file.

mysql-test/suite/sys_vars/r/sysvars_wsrep.result

@@ -143,18 +143,18 @@ READ_ONLY	NO
 COMMAND_LINE_ARGUMENT	OPTIONAL
 VARIABLE_NAME	WSREP_DIRTY_READS
 SESSION_VALUE	OFF
-GLOBAL_VALUE	NULL
+GLOBAL_VALUE	OFF
 GLOBAL_VALUE_ORIGIN	COMPILE-TIME
 DEFAULT_VALUE	OFF
-VARIABLE_SCOPE	SESSION ONLY
+VARIABLE_SCOPE	SESSION
 VARIABLE_TYPE	BOOLEAN
-VARIABLE_COMMENT	Do not reject SELECT queries even when the node is not ready.
+VARIABLE_COMMENT	Allow reads even when the node is not in the primary component.
 NUMERIC_MIN_VALUE	NULL
 NUMERIC_MAX_VALUE	NULL
 NUMERIC_BLOCK_SIZE	NULL
 ENUM_VALUE_LIST	OFF,ON
 READ_ONLY	NO
-COMMAND_LINE_ARGUMENT	NULL
+COMMAND_LINE_ARGUMENT	OPTIONAL
 VARIABLE_NAME	WSREP_DRUPAL_282555_WORKAROUND
 SESSION_VALUE	NULL
 GLOBAL_VALUE	OFF