merge with 3.23 to get:

- Fix for empty table/column names


mysql-test/t/create.test:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/ha_innodb.cc:
  Auto merged
sql/table.cc:
  Auto merged
tests/grant.pl:
  Auto merged
sql/filesort.cc:
  merge with 3.23
sql/sql_table.cc:
  merge with 3.23
tests/grant.res:
  merge with 3.23

mysql-test/t/create.test

@@ -55,6 +55,14 @@ create table test_$1.test2$ (a int);
 drop table test_$1.test2$;
 drop database test_$1;
 
+--error 1103
+create table `` (a int);
+--error 1103
+drop table if exists ``;
+--error 1166
+create table t1 (`` int);
+drop table if exists t1;
+
 #
 # Test of CREATE ... SELECT with indexes
 #