CTAN up­date: pdfx v.1.5.8: PDF/X-1a and PDF/A-1b sup­port for pdfTeX

This is a sig­nif­i­cant up­date.
1. fixes a bug when used with LuaLaTeX — now works with older ver­sions
as well as the 2016 ver­sion of LuaLaTeX.
2. can work also with XeLaTeX — con­sult the main doc­u­men­ta­tion for the re­quired com­mand-line, and a dis­cus­sion of the lim­i­ta­tions.
3. page-size meta­data cor­re­sponds to the Me­di­aBox size.
4. now sup­ports Mul­tilin­gual Me­ta­data, us­ing legacy 8-bit en­cod­ings (Lat­in1–Lat­in9, KOI8-R, and some oth­ers).
5. sup­ports Me­ta­data given as a translit­er­a­tion; e.g. LGR for Greek and OT6 for
Ar­me­nian by pro­vid­ing a con­ver­sion into UTF-8. This also al­lows proper
book­marks with these translit­er­a­tions.
6. var­i­ous smaller im­prove­ments.

The doc­u­men­ta­tion gives com­pre­hen­sive in­struc­tions on how to eas­ily
ob­tain rel­e­vant meta­data from ex­ist­ing doc­u­ments, and how to in­clude it
to ob­tain a val­i­dat­ing PDF/A or other con­form­ing doc­u­ment. It in­cludes
ex­am­ples us­ing var­i­ous lan­guages.