What steps will reproduce the problem?
1. Be missing one of LuaExpat, LuaSocket or LuaFileSystem, which casues util.dependencies to report it as a fatal error
2. Run `prosodyctl about`
3. Observe failure
What is the expected output?
The usual `prosodyctl about` output.
What do you see instead?
The `missingdep()` output:
> Prosody was unable to find ...
`prosodyctl about` output, ie the Lua search paths, would have been useful to diagnose why those dependencies were not found.