rustdoc: treat `allowed_through_unstable_modules` as deprecation#135043

bors merged 2 commits intorust-lang:masterrust-lang/rust:masterfrom

notriddle:notriddle/allowed-through-unstable-modules-is-a-deprecation-flagnotriddle/rust:notriddle/allowed-through-unstable-modules-is-a-deprecation-flagCopy head branch name to clipboard