Korean character support enhancements

Open Client and Open Server now supports the Korean character set cp949. Directories were added to the charsets directory, the table files for these charsets were added to the utf8 charset directory, the utf8.cfg file, the locales.dat, and the objectid.dat was modified to add these charsets. This Korean character set may be used in the same manner as any other charset, including having character data converted through cs_convert().