consisting of pos-review fixes and improvements.

Actually catch pushed warnings.

Keep track on the default value and use it. (Or NULL, if not declared.)

Complex return types were not stored correctly in the mysql.proc table.

Backpatching overwrote already backpatched instructions, which made it
skip the hpop instruction; possibly not only a problem for handlers,
but this is one known case when it happened.

into sanja.is.com.ua:/home/bell/mysql/bk/work-limit-5.0

commant for function

Added new test cases for this, and adjusted old tests accordingly,
and new error codes and messages.
Fixed bugs in some tests (bug2673 and use test).
Added debug printing of instructions in SPs.

Procedure names were unintentionally case-sensitive when read from the database
(but case-insensitive when fetched from the cache).
Note that the DB-part of qualified names is still case-sensitive (for consistency
with other usage in mysql).

Phase 4 (final): Remove associated stored procedures when a database is dropped.

Phase 3: Made qualified names work for functions as well.

into mysql.com:/home/pem/work/mysql-5.0-merge

Had to initialize some fields in lex before parsing an SP read from
mysql.proc.

Phase 2: Make SPs belong to a DB, and use qualified names.
  As a side effect, using USE in an SP is no longer allowed.
  (It just doesn't work otherwise.)

into mysql.com:/home/pem/work/mysql-5.0

SQL SECURITY DEFINER must enforce reduced rights too, not just additional rights.

without proper locking.

Phase 1: Introduced sp_name class, for qualified name support.

into mysql.com:/home/pem/work/mysql-5.0

into mysql.com:/home/pem/work/mysql-5.0

into mysql.com:/space/my/mysql-5.0

into mysql.com:/home/pem/work/mysql-5.0-merge

into bar.intranet.mysql.r18.ru:/usr/home/bar/mysql-4.1

into deer.(none):/home/hf/work/mysql-4.1.2211

previous one had error

into eagle.mysql.r18.ru:/home/vva/work/BUG_2593/mysql-4.1

into eagle.mysql.r18.ru:/home/vva/work/BUG_2593/mysql-4.1

into mysql.com:/home/pem/work/mysql-5.0