Commit 73af845e changed
the default libcap installation path (/usr/sbin --> /sbin).

See also: !777

This version now defaults to setting the root shell to /bin/zsh instead
of /bin/sh, which solves our PS1 issue using su(1).

Closes: #206
Ref: #1103

* Set cap_sys_time on horizon-qt5 to allow setting the clock.
  (horizon#321)

* Move gfxdetect to graphical runlevel. (horizon#346)