The color preceding of the space preceding the load is
made to be consistent with the load color instead of the default. This is
consistent with the CPU percentage color and easier to read.
All the platforms were using identical logic based on getloadavg() function to
get the load avg stats (except linux, which was using sinfo struct, but can use getloadavg() function). I've noticed this while working on NetBSD port.
Also: fixed a typo on freebsd.
