Cleanup /var/spool/mail/* and /var/cache/nubis/*
Cleanup /var/spool/mail/* and /var/cache/nubis/*

Fixes #354

tinnightcap/nubis-base,tinnightcap/nubis-base,tinnightcap/nubis-base,gozer/nubis-base,limed/nubis-base,gozer/nubis-base,gozer/nubis-base,Nubisproject/nubis-base,limed/nubis-base,limed/nubis-base,Nubisproject/nubis-base