Make the `vtmode' config option work under X. In the process I've

Make the `vtmode' config option work under X. In the process I've
had to move another of its values out into wincfg.c - paradoxically,
this was the `font has X encoding' option! (Because the Unix font
handling code expects to be able to tell for _itself_ whether it has
a font with X-encoded line drawing glyphs.)

[originally from svn r3145]