Fix for stored procedures BUG#4726: Stored procedure crash when looping over SELECT with complex WHERE's.

  mysqld crashes on CREATE TABLE in a database with corrupted db.opt file.
  Bug#4646

Accidently worked on many platforms, but not all.

into neptunus.(none):/home/magnus/mysql-4.1

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

made different fields for view updatebility in principle and updatability during this execution (BUG#4601)

Sub-CALLs of procedures zapped thd->current_arena for good.

fixed error handling

Removing old directories for test/ using bk rmdir

  usable for unix builds": zlib 1.2.1 imported

into sanja.is.com.ua:/home/bell/mysql/bk/work-4.1

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

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

new tests to ensure that prepared statement *really* work
(and that MySQL not picks up some number from arbitrary location
that happens to match the parameter's value)

We now get an run-time error instead of a crash (although a slightly misleading
error message, but it's an improvement).

into sanja.is.com.ua:/home/bell/mysql/bk/work-2-5.0

error handling of view initialization fixed (Bug#4599)

into mysql.com:/home/mysql_src/mysql-4.1-874

client code and replication slave code, as far as LOAD DATA INFILE and
other queries' execution is concerned. Duplication of code leads to
replication bugs, because the replication duplicate lags much behind.
Fix for 2 Valgrind errors on slave replicating LOAD DATA INFILE
  - one serious (causing a random test failure in rpl_loaddata in 5.0)
  - one not serious (theoretically a bug but not dangerous): uninited thd->row_count

into serg.mylan:/usr/home/serg/Abk/mysql-5.0