7999530a8d
I've obtained a draft, <u:> is indeed equivalent to u (to my surprise), and <th> sorts immediately after z. The correct ordering is algorithmic (based on the EOR) and can not be accurately represented as a table.
$FreeBSD$ WARNING: For the compatibility sake try to keep collating table backward compatible with ASCII, i.e. add other symbols to the existent ASCII order. For mnemonic names see ftp://std.dkuug.dk/i18n/charmaps/