Log Message:
Update to 2.21

https://git.finalrewind.org/feh/plain/ChangeLog
Sat, 07 Oct 2017 12:14:17 +0200  Daniel Friesel <derf+feh@finalrewind.org>

* Release v2.21
    * Add toggle_fixed_geometry ('g') key binding to toggle window auto-resize
    * Improve control via terminal input
    * Fix crash (segmentation fault) when using feh -O in non-index mode
    * Fix --force-aliasing (and possibly other options) missing from ~/.fehbg
      when using them for background setting

Thu, 07 Sep 2017 20:20:11 +0200  Daniel Friesel <derf+feh@finalrewind.org>

* Release v2.20
    * Fix clang/gcc warnings (Patches by orbea)
    * Add support for control via terminal input. feh will read key presses
      from the controlling terminal and handle them like X11 key presses
      inside the feh window. Note that at the moment, only lower / upper case
      ASCII letters and a very small set of additional keys are supported.
    * Fix broken ImageMagick support (see --magick-timeout) when using some
      ImageMagick versions <https://github.com/derf/feh/issues/323>
    * Remove images from the filelist if they were removed by executing a
      user-defined action <https://github.com/derf/feh/issues/322>