D.3.9 Modifications de la version 3.21.25

• Changed typedef 'string' to typedef 'my_string' for better portability.
• You can now kill threads that are waiting on a disk full condition.
• Fixed some problems with UDF functions.
• Added long options to isamchk. Try isamchk --help.
• Fixed a bug when using 8 bytes long (alpha); filesort() didn't work. Affects DISTINCT, ORDER BY and GROUP BY on 64-bit processors.