these were removed from the standard but still offered as an extension
in langinfo.h, so nl_langinfo should support them.

due to a skipped slot and missing null terminator, the last few
strings were off by one or two slots from their item codes.

this change is presently non-functional since the callees do not yet
use their locale argument for anything.

LC_GLOBAL_LOCALE refers to the global locale, controlled by setlocale,
not the thread-local locale in effect which these functions should be
using. neither LC_GLOBAL_LOCALE nor 0 has an argument to the *_l
functions has behavior defined by the standard, but 0 is a more
logical choice for requesting the callee to lookup the current locale.
in the future I may move the current locale lookup the the caller (the
non-_l-suffixed wrapper).

at this point, all of the locale logic is dummied out, so no harm was
done, but it should at least avoid misleading usage.