Debug stuff is meaningful for developers, only. Also often
enabled on a per-file basis depending on the problem at hand.
Two reasons to remove it from Configtool and one reason to
remove it from the config files.
This should solve issue #137.
It was certainly a good idea, but also always a suspect of
malfunctions and as such, almost never used. Newer code
organisation moves most of the code behind it to dda_clock()
anyways, so it also became mostly obsolete.
Rest In Peace, STEP_INTERRUPT_INTERRUPTIBLE, you were matter
of quite a number of interesting discussions and investigations.
Changes for Configtool by jbernardis <jeff.bernardis@gmail.com>