Use an seperate /tmp var disk to provide an more robust system. A full /tmp is
not and issue while an full /var could cause all kind of weird and wonderfull
magic, as PID administration if for example done at /var/run, etc...
Done by undoing the stuff to make it happen by nanobsd.sh, as their is no
direct flag to control it.
As late_customize is an hook never used, make sure it does not break our
package build sub-system.
Related-To: nodefactory:ticket:162
