merge with 4.1

BitKeeper/etc/ignore:
  auto-union
BitKeeper/etc/logging_ok:
  auto-union
BitKeeper/triggers/post-commit:
  Auto merged
Docs/Support/texi2html:
  Auto merged
Makefile.am:
  Auto merged
client/Makefile.am:
  Auto merged
client/mysql.cc:
  Auto merged
client/mysqldump.c:
  Auto merged
include/my_base.h:
  Auto merged
include/my_global.h:
  Auto merged
include/my_pthread.h:
  Auto merged
include/my_sys.h:
  Auto merged
include/my_time.h:
  Auto merged
include/mysql.h:
  Auto merged
include/mysql_com.h:
  Auto merged
innobase/buf/buf0buf.c:
  Auto merged
innobase/include/row0mysql.h:
  Auto merged
innobase/row/row0sel.c:
  Auto merged
libmysql/libmysql.c:
  Auto merged
libmysqld/examples/Makefile.am:
  Auto merged
myisam/mi_check.c:
  Auto merged
mysql-test/include/ps_modify.inc:
  Auto merged
mysql-test/install_test_db.sh:
  Auto merged
mysql-test/r/alter_table.result:
  Auto merged
mysql-test/r/auto_increment.result:
  Auto merged
mysql-test/r/bdb.result:
  Auto merged
mysql-test/r/ctype_latin1_de.result:
  Auto merged
mysql-test/r/ctype_recoding.result:
  Auto merged
mysql-test/r/fulltext.result:
  Auto merged
mysql-test/r/func_gconcat.result:
  Auto merged
mysql-test/r/func_group.result:
  Auto merged
mysql-test/r/func_if.result:
  Auto merged
mysql-test/t/derived.test:
  Auto merged
mysql-test/t/insert.test:
  merge with 4.1
  Fixed test case to not use 'if exists' when it shouldn't
mysql-test/t/range.test:
  merge with 4.1
  Added missing drop table
sql/ha_ndbcluster.cc:
  merge with 4.1
  Simple optimization: use max() instead of ? :
sql/item_func.cc:
  merge with 4.1
  (Added back old variable names for easier merges)
sql/opt_range.cc:
  merge with 4.1
  Removed argument 'parent_alloc' from QUICK_RANGE_SELECT as this was not used
  Added assert if using QUICK_GROUP_MIN_MAX_SELECT with parent_alloc as the init() function can't handle this
  Changed back get_quick_select_for_ref() to use it's own alloc root becasue this function may be called several times for one query
sql/sql_handler.cc:
  merge with 4.1
  change variable 'err' to 'error' as same function had a label named 'err'
sql/sql_update.cc:
  Use multi-update code from 5.0 instead of 4.1
  We will fix the locking code shortly in 5.0 to be faster than in 4.1

sql/sql_lex.h

@@ -283,6 +283,7 @@ public:
   static void *operator new(size_t size, MEM_ROOT *mem_root)
   { return (void*) alloc_root(mem_root, (uint) size); }
   static void operator delete(void *ptr,size_t size) {}
+  static void operator delete(void *ptr,size_t size, MEM_ROOT *mem_root) {}
   st_select_lex_node(): linkage(UNSPECIFIED_TYPE) {}
   virtual ~st_select_lex_node() {}
   inline st_select_lex_node* get_master() { return master; }
@@ -333,6 +334,7 @@ class THD;
 class select_result;
 class JOIN;
 class select_union;
+class Procedure;
 class st_select_lex_unit: public st_select_lex_node {
 protected:
   TABLE_LIST result_table_list;
@@ -379,6 +381,7 @@ public:
 
   st_select_lex *union_distinct; /* pointer to the last UNION DISTINCT */
   bool describe; /* union exec() called for EXPLAIN */
+  Procedure *last_procedure;	 /* Pointer to procedure, if such exists */
 
   void init_query();
   st_select_lex_unit* master_unit();
@@ -413,7 +416,7 @@ public:
   int change_result(select_subselect *result, select_subselect *old_result);
   void set_limit(st_select_lex *values, st_select_lex *sl);
 
-  friend void mysql_init_query(THD *thd, uchar *buf, uint length, bool lexonly);
+  friend void lex_start(THD *thd, uchar *buf, uint length);
   friend int subselect_union_engine::exec();
 };
 typedef class st_select_lex_unit SELECT_LEX_UNIT;
@@ -569,7 +572,7 @@ public:
   
   bool test_limit();
 
-  friend void mysql_init_query(THD *thd, uchar *buf, uint length, bool lexonly);
+  friend void lex_start(THD *thd, uchar *buf, uint length);
   st_select_lex() {}
   void make_empty_select()
   {
@@ -578,6 +581,7 @@ public:
   }
   bool setup_ref_array(THD *thd, uint order_group_num);
   bool check_updateable(char *db, char *table);
+  bool check_updateable_in_subqueries(char *db, char *table);
   void print(THD *thd, String *str);
   static void print_order(String *str, ORDER *order);
   void print_limit(THD *thd, String *str);
@@ -687,7 +691,7 @@ typedef struct st_lex
   USER_RESOURCES mqh;
   ulong thread_id,type;
   enum_sql_command sql_command;
-  thr_lock_type lock_option;
+  thr_lock_type lock_option, multi_lock_option;
   enum SSL_type ssl_type;			/* defined in violite.h */
   enum my_lex_states next_state;
   enum enum_duplicates duplicates;