MDEV-5786: mysql_upgrade on galera replicates "alter table" on

system tables

With wsrep patch, binary logging is implicitly enabled. This
fix makes sure that it is turned off for --skip-write-binlog
by swithcing off wsrep_on.

client/mysql_upgrade.c

@@ -523,7 +523,12 @@ static int run_query(const char *query, DYNAMIC_STRING *ds_res,
   int ret;
   File fd;
   char query_file_path[FN_REFLEN];
+#ifdef WITH_WSREP
+  /* Note: wsrep_on=ON implicitly enables binary logging. */
+  const uchar sql_log_bin[]= "SET SQL_LOG_BIN=0, WSREP_ON=OFF;";
+#else
   const uchar sql_log_bin[]= "SET SQL_LOG_BIN=0;";
+#endif /* WITH_WSREP */
 
   DBUG_ENTER("run_query");
   DBUG_PRINT("enter", ("query: %s", query));

client/mysqlcheck.c

@@ -729,9 +729,15 @@ static int use_db(char *database)
   DBUG_RETURN(0);
 } /* use_db */
 
+/* Do not send commands to replication slaves. */
 static int disable_binlog()
 {
+#ifdef WITH_WSREP
+  /* Additionally turn off @@wsrep_on to disable implicit binary logging. */
+  const char *stmt= "SET SQL_LOG_BIN=0, WSREP_ON=OFF";
+#else
   const char *stmt= "SET SQL_LOG_BIN=0";
+#endif /* WITH_WSREP */
   return run_query(stmt);
 }