[luatex] Luatex primitive names

[Yue Wang]

Hi,

> \directlua will always be there as it is needed to enable the primitives  so
> it is a save test

what about the getopt route?

luatex --ini foo (using tex82)
luatex --ini foo --pdftex (using pdftex)
luatex --ini foo --pdftex --etex (using pdfetex)
luatex --ini foo --luatex (using luatex)

so no \directlua is needed for bootsrtap.

Yue Wang