Merge branch '5.5' into 10.1

Author: sanja-byelkin

mysql-test/r/events_bugs.result

@@ -684,7 +684,7 @@ SET GLOBAL READ_ONLY = 1;
 # Connection: u1_con (mysqltest_u1@localhost/events_test).
 #
 
-CREATE EVENT e1 ON SCHEDULE AT '2020-01-01 00:00:00' DO SET @a = 1;
+CREATE EVENT e1 ON SCHEDULE AT '2038-01-01 00:00:00' DO SET @a = 1;
 ERROR HY000: The MariaDB server is running with the --read-only option so it cannot execute this statement
 
 ALTER EVENT e1 COMMENT 'comment';
@@ -697,7 +697,7 @@ ERROR HY000: The MariaDB server is running with the --read-only option so it can
 # Connection: root_con (root@localhost/events_test).
 #
 
-CREATE EVENT e1 ON SCHEDULE AT '2020-01-01 00:00:00' DO SET @a = 1;
+CREATE EVENT e1 ON SCHEDULE AT '2038-01-01 00:00:00' DO SET @a = 1;
 Warnings:
 Warning	1105	Event scheduler is switched off, use SET GLOBAL event_scheduler=ON to enable it.
 

mysql-test/t/events_bugs.test

@@ -1034,7 +1034,7 @@ SET GLOBAL READ_ONLY = 1;
 --echo
 
 --error ER_OPTION_PREVENTS_STATEMENT
-CREATE EVENT e1 ON SCHEDULE AT '2020-01-01 00:00:00' DO SET @a = 1;
+CREATE EVENT e1 ON SCHEDULE AT '2038-01-01 00:00:00' DO SET @a = 1;
 
 --echo
 
@@ -1058,7 +1058,7 @@ DROP EVENT e1;
 
 --echo
 
-CREATE EVENT e1 ON SCHEDULE AT '2020-01-01 00:00:00' DO SET @a = 1;
+CREATE EVENT e1 ON SCHEDULE AT '2038-01-01 00:00:00' DO SET @a = 1;
 
 --echo
 

sql/threadpool_unix.cc

@@ -1176,7 +1176,7 @@ void wait_begin(thread_group_t *thread_group)
   DBUG_ASSERT(thread_group->connection_count > 0);
 
   if ((thread_group->active_thread_count == 0) && 
-     (thread_group->queue.is_empty() || !thread_group->listener))
+     (!thread_group->queue.is_empty() || !thread_group->listener))
   {
     /* 
       Group might stall while this thread waits, thus wake