startx always used to start a new X server on a new TTY; now it starts
on the current vt.

This is the result of a block of code in startx that forces "vtarg" to
the equivalent of `tty`.
The sole reason for this is that logind gets confused when something opens
on a new vt.
Will Devuan include an xinit package that doesn't do this?

Thanks,
Isaac Dunham