Bug#971426: vte2.91: Please build vte WITH_SIXEL

[Alex Waite]

2020.09.30, smcv at debian.org:
> [...]
> Sixel support was briefly in the vte 0.61.x development branch, but
> it was removed before vte 0.62 (presumably it wasn't ready), so this
> will have to wait for a new upstream release where they consider sixel
> support to be ready for wider use.

Ahh; I did not realize that. Thank you for the clarification!

---Alex