* multi-table updates
* new paid feature for limiting number of queries per hour for users
* optional syntax for multi-table deletes
* optimization for SQL_CALC_FOUND_ROWS
* a small addition for CREATE .. SELECT that will be of future use

I know that all this will require many additions to documentation, 
which I have not done, but I am at Arjen's disposal to help him document
all this.



libmysqld/lib_sql.cc:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
mysql-test/r/multi_update.result:
  Change of the result to accomodate multi-table updates
mysql-test/t/multi_update.test:
  Change in multi-table tests to accomodate multi-table updates
BitKeeper/etc/ignore:
  Added 50 sql/new.cc to the ignore list
scripts/mysql_install_db.sh:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/item_timefunc.h:
  This is a small feature that will be of use later in the proper 
  creation of the tables out of CREATE ... SELECT...
  
  Further changes will come after this resolve/push/test passes ..
sql/lex.h:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/mysql_priv.h:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/mysqld.cc:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/sql_acl.cc:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/sql_acl.h:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/sql_class.h:
  These are changes required for multi-table updates.
sql/sql_lex.h:
  Changes required for both multi-table updates and limiting number of 
  queries per hour (paid feature).
sql/sql_parse.cc:
  Ha ! So many changes. 
  
  * multi-table updates
  * limiting number of queries per hour for users
sql/sql_select.cc:
  Optimisation for SQL_CALC_FOUND_ROWS, when a query involves a single
  table, without WHERE or GROUP clause
sql/sql_update.cc:
  multi-table updates
sql/sql_yacc.yy:
  Many things :
  * multi-table updates
  * limiting number of queries per hour for users
  * new optional syntax for multi-table deletes. This one is different 
    from the one demanded by user. USING clause MUST include ALL tables, 
    not just the ones that are used and not deleted from.