Now the currently displayed version of the current document,
rather than the latest version of the current document, will be used
for the document info box and the current_document() Lua function.
... since the latter is for printing int64_T and we don't check for that and
we use PRId64 only for printing values having the off_t types.
Besides off_t has it's own ELinks specific defaults so it should be safer
to use an internal format string. If off_t is 8 bytes use "lld" else use
"ld".
Reported-by: Andy Tanenbaum <ast@cs.vu.nl>
