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."

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

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

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

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

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

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

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

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

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

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

into  mysql.com:/home/emurphy/iggy/mysql-5.0

into  mysql.com:/home/kgeorge/mysql/5.0/clean

into  mysql.com:/home/kgeorge/mysql/5.0/B18681

into  mysql.com:/home/kgeorge/mysql/5.0/B18681

into  mysql.com:/home/kgeorge/mysql/5.0/B14875

When reading a view definition from a .frm file it was
throwing a SQL error if the DEFINER user is not defined.
Changed it to a warning to match the (documented) case
when a view with undefined DEFINER user is created.

The check for view security was lacking several points :
1. Check with the right set of permissions : for each table ref that
participates in a view there were the right credentials to use in it's
security_ctx member, but these weren't used for checking the credentials.
This makes hard enforcing the SQL SECURITY DEFINER|INVOKER property
consistently.
2. Because of the above the security checking for views was just ruled out
in explicit ways in several places.
3. The security was checked only for the columns of the tables that are
brought into the query from a view. So if there is no column reference
outside of the view definition it was not detecting the lack of access to
the tables in the view in SQL SECURITY INVOKER mode.

The fix below tries to fix the above 3 points.

into  mysql.com:/space/pekka/ndb/version/my50-bug14509

into  mysql.com:/space/pekka/ndb/version/my50-bug14509

into  mysql.com:/home/kgeorge/mysql/5.0/clean

into  mysql.com:/home/kgeorge/mysql/5.0/B18742-2

into  mysql.com:/home/kgeorge/mysql/5.0/B18742-2

into  mysql.com:/home/kgeorge/mysql/5.0/B19700

  
The unsigned flag in Item was not propagated through the single value subqueries.
This caused the result to be treated as signed.

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

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

Replaced COND_refresh with COND_global_read_lock becasue of a bug in NTPL threads when using different mutexes as arguments to pthread_cond_wait()
The original code caused a hang in FLUSH TABLES WITH READ LOCK in some circumstances because pthread_cond_broadcast() was not delivered to other threads.
This fixes:
Bug#16986: Deadlock condition with MyISAM tables
Bug#20048: FLUSH TABLES WITH READ LOCK causes a deadlock

into  april.(none):/home/svoj/devel/mysql/BUG17001/mysql-5.0

Changed COM_STATISTICS to display the global status, instead of thead status, for slow queries and table opens.

into  mysql.com:/home/emurphy/src/bk-clean/mysql-5.0-bug19394

into  april.(none):/home/svoj/devel/mysql/BUG17001/mysql-5.0

into  mysql.com:/opt/local/work/mysql-5.0-runtime