This directory holds configuration files which allow MySQL to work withdifferent character sets.  It contains:*.conf    Each conf file contains four tables which describe character types,    lower- and upper-case equivalencies and sorting orders for the    character values in the set.Index    The Index file lists all of the available charset configurations.    Each charset is paired with a number.  The number is stored    IN THE DATABASE TABLE FILES and must not be changed.  Always    add new character sets to the end of the list, so that the    numbers of the other character sets will not be changed.Compiled in or configuration file?    When should a character set be compiled in to MySQL's string library    (libmystrings), and when should it be placed in a configuration    file?    If the character set requires the strcoll functions or is a    multi-byte character set, it MUST be compiled in to the string    library.  If it does not require these functions, it should be    placed in a configuration file.    If the character set uses any one of the strcoll functions, it    must define all of them.  Likewise, if the set uses one of the    multi-byte functions, it must define them all.  See the manual for    more information on how to add a complex character set to MySQL.Syntax of configuration files    The syntax is very simple.  Comments start with a '#' character and    proceed to the end of the line.  Words are separated by arbitrary    amounts of whitespace.    For the character set configuration files, every word must be a    number in hexadecimal format.  The ctype array takes up the first    257 words; the to_lower, to_upper and sort_order arrays take up 256    words each after that.