MySQL Manual | D.7.3 Changes in release 3.20.16

More changes in MIT-pthreads to get them safer. Fixed also some link bugs at least in SunOS.
Changed mysqld to work around a bug in MIT-pthreads. This makes multiple small SELECT operations 20 times faster. Now lock_test.pl should work.
Added mysql_FetchHash(handle) to mysqlperl.
The mysqlbug script is now distributed built to allow for reporting bugs that appear during the build with it.
Changed `libmysql.c' to prefer getpwuid() instead of cuserid().
Fixed bug in SELECT optimiser when using many tables with the same column used as key to different tables.
Added new latin2 and Russian KOI8 character tables.
Added support for a dummy GRANT command to satisfy Powerbuilder.

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