Link to relevant page (if any): https://prosody.im/doc/migrator
What's wrong and how can it be improved?
It needs to be updated to reflect changes in trunk to use native Prosody storage modules.
It also still mentions `main.lua` which hasn't existed since 2011: https://hg.prosody.im/trunk/rev/f15b4e9ba688
Some words about the new way: https://hg.prosody.im/site/rev/0f8dbdd4d123
Might need a bit more polish