WL#5030: Split and remove mysql_priv.h

This patch:

- Moves all definitions from the mysql_priv.h file into
  header files for the component where the variable is
  defined
- Creates header files if the component lacks one
- Eliminates all include directives from mysql_priv.h
- Eliminates all circular include cycles
- Rename time.cc to sql_time.cc
- Rename mysql_priv.h to sql_priv.h

sql/sql_delete.h

@@ -0,0 +1,34 @@
+/* Copyright 2006-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */
+
+#ifndef SQL_DELETE_INCLUDED
+#define SQL_DELETE_INCLUDED
+
+#include "my_base.h"                            /* ha_rows */
+
+class THD;
+class TABLE_LIST;
+class Item;
+
+typedef class Item COND;
+typedef struct st_sql_list SQL_LIST;
+
+int mysql_prepare_delete(THD *thd, TABLE_LIST *table_list, Item **conds);
+bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
+                  SQL_LIST *order, ha_rows rows, ulonglong options,
+                  bool reset_auto_increment);
+bool mysql_truncate(THD *thd, TABLE_LIST *table_list, bool dont_send_ok);
+
+#endif /* SQL_DELETE_INCLUDED */