Add configuration for xdvipsk dvi driver

[sigto]

To restore broken compatibility with xdvipsk dvi driver in luaotfload version 3.15. Compatibility with previous default dvisvgm dvi driver remains. Example of new configuration: [run] dvi-driver = xdvipsk

[zauguin]

Closed since the functionality is added in 7fc26b7.

This uses default-dvi-driver in the run section,