add renames as unresolved q

Author: Manishearth

text/0000-packages-as-optional-namespaces.md

@@ -213,6 +213,7 @@ Python has a similar coupling of top-level namespaces and modules with the files
 # Unresolved questions
 
  - How exactly should the Cargo.toml `lib.name` key work in this world, and how does that integrate with `--extern` and `-L` and sysroots?
+ - Should we allow renames like `"foo::bar" = { package = "foo_bar", version = "1.0" }` in Cargo.toml?
 
 # Future possibilities