Generally, how much space we have in squashfs, or tmpfs shouldn't
interest us. This becomes more relevant in distros like Ubuntu, where
snaps are a thing, and each snap mounts their own FS in a squashfs that
is always full, thus falsifying the output of sysinfo.
This does remove the net* commands from the
Unix version that may return at a later date
with OSX and Windows support.
This commit also makes numerious other changes
such as code cleanup, reformatting, etc.
Closes#829