Ensure that parallel parsing sbs calls pass on --no-depend-generate and --no-depend-include (as these influence makefile generation).
Make .DEFAULT a double-colon target, so we don't have to worry about duplicate instances due to -include.
Code review updates.
###################
Users' Flow Diagram
###################
.. raw:: html
<img src="images/user-graph.dot.png" alt="Flow Diagram" usemap="#flowdiagram" style="border-style: none"/>
<map name="flowdiagram" id="flowdiagram">
.. raw:: html
:file: user-graph.dot.cmap
.. raw:: html
</map>