Add short options for --[no-]include-dependencies.
This adds and documents -d (for 'deps') as a short alias for --include-dependencies, and a corresponding -s (for 'single') as a short alias for --no-include-dependencies.
Suggested by Andrew Shark, and I like the idea. I do think having -d/-D do contrary things is a bit too cute to be memorable but if there's strong opinion in other directions it's easy to adjust.
See also bug 473859