Log Message:
psftools: update to 1.1.1.

2021-01-22 John Elliott

* psftools-1.1.1 released.
* Core functions added to support the Berkeley Unix vfont format,
  a variable-width font format that otherwise has similar
  capabilities to PSF1.
* Also supports a new 'vfont2' format, aiming at lossless conversion
  PSF2 -> vfont2 -> PSF2.
* New utilities to support vfont: psf2vfont, vfont2psf, txt2vfont,
  vfont2txt, vfont2ppm.