https://github.com/QubesOS/qubes-issues/issues/1100
Deprecated functions setVerboseMode, getXtrace, setXtrace and variable XTRACE, because those were broken and their only use case was function umount_kill. Re-implemented disabling xtrace in function umount_kill, if variable VERBOSE is lower than or equal 2.
Added a few more whonix replacement tweaks
Updated umount_kill.sh to be able to umount directories that have been deleted
Added a DEBUG feature to save / use already created debootstrap image to save time debugging