Alterações na distribuição 3.23.3

Added patches for MIT-pthreads on NetBSD.

• Fixed range bug in MyISAM.
• ASC is now the default again for ORDER BY.
• Added LIMIT to UPDATE.
• Added mysql_change_user() function to the MariaDB C API.
• Added character set to SHOW VARIABLES.
• Added support of --[whitespace] comments.
• Allow INSERT into tbl_name VALUES (), that is, you may now specify an empty value list to insert a row in which each column is set to its default value.
• Changed SUBSTRING(text FROM pos) to conform to SQL-99. (Before this construct returned the rightmost pos characters.)
• SUM() with GROUP BY returned 0 on some systems.
• Changed output for SHOW TABLE STATUS.
• Added DELAY_KEY_WRITE option to CREATE TABLE.
• Allow AUTO_INCREMENT on any key part.
• Fixed problem with YEAR(NOW()) and YEAR(CURDATE()).
• Added CASE construct.
• New function COALESCE().

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