lua.setluaname(n, s) and lua.getluaname(n): fixed mismatch between documentation and implementation (J. Friedrich).

<CS_SEAC>: look for the composite(d) glyphs too, to include in /CharSet , as in pdfTeX (Hàn Thế Thành).

Ensured that load_hyphenation has enough Lua stack, and pops the latest table pushed in (Michal Vlasák).