Fixed shutdown problem on HPUX

Docs/manual.texi:
  Changelog
mysql-test/r/innodb.result:
  Update results after InnoDB optimizer changes.

Docs/manual.texi

@@ -46888,6 +46888,12 @@ not yet 100% confident in this code.
 @appendixsubsec Changes in release 3.23.47
 @itemize @bullet
 @item
+InnoDB now supports @code{NULL} in keys.
+@item
+Fixed shutdown problem on HPUX. (Introduced in 3.23.46)
+@item
+Added 'DO expression' command.
+@item
 Fixed core-dump bug in replication when using SELECT RELEASE_LOCK();
 @item
 Added new statement DO expression,[expression].

mysql-test/r/innodb.result

@@ -111,11 +111,11 @@ id	parent_id	level
 1010	102	2
 1015	102	2
 table	type	possible_keys	key	key_len	ref	rows	Extra
-t1	index	level	level	1	NULL	39	where used; Using index
+t1	ref	level	level	1	const	12	where used; Using index
 table	type	possible_keys	key	key_len	ref	rows	Extra
-t1	index	level	level	1	NULL	39	where used; Using index
+t1	ref	level	level	1	const	12	where used; Using index
 table	type	possible_keys	key	key_len	ref	rows	Extra
-t1	ref	level	level	1	const	12	
+t1	ref	level	level	1	const	12	where used
 level	id
 1	1002
 1	1003
@@ -133,9 +133,9 @@ level	id	parent_id
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	error	The handler for the table doesn't support check/repair
 Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Comment
-t1	0	PRIMARY	1	id	A	2	NULL	NULL	
-t1	1	parent_id	1	parent_id	A	2	NULL	NULL	
-t1	1	level	1	level	A	2	NULL	NULL	
+t1	0	PRIMARY	1	id	A	87	NULL	NULL	
+t1	1	parent_id	1	parent_id	A	21	NULL	NULL	
+t1	1	level	1	level	A	4	NULL	NULL	
 gesuchnr	benutzer_id
 1	1
 2	1
@@ -438,7 +438,7 @@ hello	1
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	error	The handler for the table doesn't support check/repair
 Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Comment
-t1	0	PRIMARY	1	a	A	2	NULL	NULL	
+t1	0	PRIMARY	1	a	A	1	NULL	NULL	
 i	j
 1	2
 i	j

sql/mysqld.cc

@@ -610,13 +610,20 @@ void kill_mysql(void)
   {
     DBUG_PRINT("error",("Got error %d from pthread_kill",errno)); /* purecov: inspected */
   }
-#else
+#elif !defined(SIGNALS_DONT_BREAK_READ)
   kill(current_pid,MYSQL_KILL_SIGNAL);
 #endif
   DBUG_PRINT("quit",("After pthread_kill"));
   shutdown_in_progress=1;			// Safety if kill didn't work
 #ifdef SIGNALS_DONT_BREAK_READ    
+  if (!abort_loop)
+  {
+    pthread_t tmp;
     abort_loop=1;
+    if (pthread_create(&tmp,&connection_attrib, kill_server_thread,
+			   (void*) 0))
+      sql_print_error("Error: Can't create thread to kill server");
+  }
 #endif    
   DBUG_VOID_RETURN;
 }