support of merged VIEW over several tables added (WL#1809)

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

fixed privilege system upgrade script, to allow VIEW privileges for used who have CREATE privilege (BUG#5329)

into mysql.com:/home/cps/mysql/devel/im/default_patch/mysql-5.0

options.

test result.

  Make "FRAC_SECOND"/"SQL_TSI_FRAC_SECOND" non-reserved words,
  must like "SECOND"/"SQL_TSI_SECOND", "MINUTE"/"SQL_TSI_MINUTE",
  etc.
  Will wait for okay to push. (It doesn't break any tests.)

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

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

  Dropping the table was not the real problem, the problem was with errors
  occuring within error handlers.

Added previously missing sql_trigger.cc file to embedded library.

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

into mysql.com:/home/dlenev/src/mysql-5.0-1218-a

Fixed (together with Guilhem) bugs in mysqlbinlog regarding --offset
Prefix addresses with 0x for easier comparisons of debug logs
Fixed problem where MySQL choosed index-read even if there would be a much better range on the same index
This fix changed some 'index' queries to 'range' queries in the test suite
Don't create 'dummy' WHERE clause for trivial WHERE clauses where we can remove the WHERE clause.
This fix removed of a lot of 'Using where' notes in the test suite.
Give NOTE instead of WARNING if table/function doesn't exists when using DROP IF EXISTS
Give NOTE instead of WARNING for safe field-type conversions

After review and after merge fixes.

  Easy to prevent crash, but the question was how to treat this case?
  We ended up implementing the "global" SPs (i.e. with no associated
  db), which were planned but left unresolved when SPs moved into dbs.
  So now things like "call .p()" work too.

  Althought techically not a but (as it's functioning as designed),
  it was decided that the design should be changed. Some users have
  a problem with dates being '0000-00-00' and the SQL standard specifies
  that the modification date should be the same as the creation date
  at creation.

Mostly needed for Monty for him getting notion what needed for triggers 
from new .FRM format. 

Things to be done:
- Right placement of trigger's invocations
- Right handling of errors in triggers (including transaction rollback)
- Support for priviliges
- Right handling of DROP/RENAME table (hope that it will be handled automatically
  with merging of .TRG into .FRM file)
- Saving/restoring some information critical for trigger creation and replication
  with their definitions (e.g. sql_mode, creator, ...)
- Replication

Already has some known bugs so probably not for general review.

into silver_beast.(none):/home/cps/mysql/devel/im/default_patch/mysql-5.0