invoker name

The bug was fixed similar to how context switch is handled in
Item_func_sp::execute_impl(): we store pointer to current
Name_resolution_context in Item_func_current_user class, and use
its Security_context in Item_func_current_user::fix_fields().

into  rurik.mysql.com:/home/igor/dev/mysql-5.0-0

into  zippy.(none):/home/cmiller/work/mysql/mysql-5.0

into  shellback.(none):/home/msvensson/mysql/mysql-5.0

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0

into  shellback.(none):/home/msvensson/mysql/mysql-5.0-maint

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0

into  mysql.com:/home/marty/MySQL/mysql-5.0

into  perch.ndb.mysql.com:/home/jonas/src/50-work

  Dont be too aggressive in Dbtc::nodeFailCheckTransaction
  let it timeout by 1, so that it does not assert that it has waited too long
  old impl. set timeotu value to 0, making timeout = (ctcTimer - 0) which could be quite big.

into  rurik.mysql.com:/home/igor/dev/mysql-5.0-0

into  devsrv-b.mysql.com:/users/msvensson/mysql-5.0

 - avoid allocating memory for each call to 'EVP_md5' and 
   'EVP_des_ede3_cbc' which were not released until server was stopped
 - Those functions are used from the SQL function 'des_encrypt' and
   'des_decrypt'.

adapting to pushbuild's custom to switch from default pathes. The name for
var directory must be set with MYSQLTEST_VARDIR.

into  shellback.(none):/home/msvensson/mysql/mysql-5.0

 - Part 1, fixes rpl- and federated-tests where connection is made to 127.0.0.1

 - Include prefix files that renames all public functions in yaSSLs
   OpenSSL API to ya<function_name>. They will otherwise conflict
   with OpenSSL functions if loaded by an application that uses OpenSSL
   as well as libmysqlclient with yaSSL support.

into  mysql.com:/home/marty/MySQL/mysql-5.0

Two threads both try a shutdown sequence which creates a race to the
de-init/free of certain resources.

This exists in similar form in the client as 17926: "mysql.exe crashes
when ctrl-c is pressed in windows."

missed table to drop after merge from 4.1 

into  dl145k.mysql.com:/tmp/andrei/MERGE/5.0

into  shellback.(none):/home/msvensson/mysql/mysql-5.0

into  mysql.com:/space/pekka/ndb/version/my50

into  mysql.com:/mnt/storeage/mysql-5.0-maint_bug18669

into  mysql.com:/usr/home/ram/work/mysql-5.0

into  mysql.com:/home/alik/MySQL/devel/5.0-tree

into  mysql.com:/usr/home/ram/work/mysql-5.0

into  rurik.mysql.com:/home/igor/mysql-4.1

refers to a column name.

Bug#18282 "INFORMATION_SCHEMA.TABLES provides inconsistent info about invalid views"
This bug caused crashes or resulted in wrong data being returned
when one tried to obtain information from I_S tables about views
using stored functions.

It was caused by the fact that we were using LEX representing
statement which were doing select from I_S tables as active LEX
when contents of I_S table were built. So state of this LEX both
affected and was affected by open_tables() calls which happened
during this process. This resulted in wrong behavior and in
violations of some of invariants which caused crashes.

This fix tries to solve this problem by properly saving/resetting
and restoring part of LEX which affects and is affected by the
process of opening tables and views in get_all_tables() routine.
To simplify things we separated this part of LEX in a new class
and made LEX its descendant.

into  mysql.com:/space/pekka/ndb/version/my50