WL#5370 Keep forward-compatibility when changing

'CREATE TABLE IF NOT EXISTS ... SELECT' behaviour
BUG#55474, BUG#55499, BUG#55598, BUG#55616 and BUG#55777 are fixed
in this patch too.

This is the 5.1 part.
It implements:
- if the table exists, binlog two events: CREATE TABLE IF NOT EXISTS
  and INSERT ... SELECT

- Insert nothing and binlog nothing on master if the existing object
  is a view. It only generates a warning that table already exists.

mysql-test/suite/rpl/r/rpl_create_if_not_exists.result

@@ -65,3 +65,12 @@ c1
 DROP TABLE t1;
 DROP TABLE t2;
 DROP TABLE t3;
+
+# Bug#55616 Killing thread or query during CREATE IF NOT EXISTS makes
+# slave SQL thread abort
+
+CREATE TABLE t1 ( i INT );
+CREATE TABLE IF NOT EXISTS t1
+AS SELECT SLEEP(3);
+KILL QUERY master1;
+DROP TABLE t1;