Merge with MySQL 5.1, with following additions:

- Moved some code from innodb_plugin to xtradb, to ensure that all tests runs
- Did changes in pbxt and maria storage engines becasue of changes in thd->query
- Reverted wrong code in sql_table.cc for how ROW_FORMAT is used.

This is a re-commit of Monty's merge to eliminate an extra commit from
MySQL-5.1.42 that was accidentally included in the merge.

This is a merge of the MySQL 5.1.41 clone-off (clone-5.1.41-build). In
case there are any extra changes done before final MySQL 5.1.41
release, these will need to be merged later before MariaDB 5.1.41
release.

mysql-test/t/create.test

@@ -1198,6 +1198,23 @@ CREATE TABLE IF NOT EXISTS t2 (a INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY)
 
 DROP TABLE t1, t2;
 
+--echo #
+--echo # BUG#46384 - mysqld segfault when trying to create table with same 
+--echo #             name as existing view
+--echo #
+
+CREATE TABLE t1 (a INT);
+CREATE TABLE t2 (a INT);
+
+INSERT INTO t1 VALUES (1),(2),(3);
+INSERT INTO t2 VALUES (1),(2),(3);
+
+CREATE VIEW v1 AS SELECT t1.a FROM t1, t2;
+--error ER_TABLE_EXISTS_ERROR
+CREATE TABLE v1 AS SELECT * FROM t1;
+
+DROP VIEW v1;
+DROP TABLE t1,t2;
 
 --echo End of 5.0 tests