Add chapter on Debian maintscripts #172
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Description
This adds an explanation chapter containing a hilariously large chart which I've had stashed away on my machine for several years at this point. While I originally created the chart to try and figure out a fix to a nasty package service restart issue, it has since helped me understand unrelated issues on several occasions (always involving the execution of Debian maintscripts in some form or another).
I've paired the chart with a (rather hastily written) chapter that attempts to provide a couple of walked-through examples, in an effort to make the thing useful and (vaguely) comprehensible. The chart's source is in Graphviz DOT format; included is a Makefile I use to generate SVG and PDF variants for inclusion in HTML or PDF output (respectively).
Please let me know if any further changes would be useful (I suspect I've introduced at least some spellcheck breakage with this).
Checklist