Alterações na distribuição 3.22.2

Searching on multiple constant keys that matched more than 30% of the rows didn't always use the best possible key.

• New functions <<, >>, RPAD() and LPAD().
• You can now save default options (like passwords) in a configuration file (my.cnf).
• Lots of small changes to get ORDER BY to work when no records are found when using fields that are not in GROUP BY (MySQL extension).
• Added --chroot option to mysqld, to start mysqld in a chroot environment (by Nikki Chumakov <nikkic@cityline.ru>).
• Trailing spaces are now ignored when comparing case-sensitive strings; this should fix some problems with ODBC and flag 512!
• Fixed a core dump bug in the range optimiser.
• Added --one-thread option to mysqld, for debugging with LinuxThreads (or glibc). (This replaces the -T32 flag)
• Added DROP TABLE IF EXISTS to prevent an error from occurring if the table doesn't exist.
• IF and EXISTS are now reserved words (they would have to be sooner or later).
• Added lots of new options to mysqldump.
• Server error messages are now in mysqld_error.h.
• The server/client protocol now supports compression.
• All bug fixes from MariaDB Version 3.21.32.

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