Rollup of 10 pull requests#82718

Merged

bors merged 24 commits intorust-lang:masterfrom

JohnTitor:rollup-vpfx3j2

Mar 3, 2021

Commits on Feb 28, 2021

unix: Non-mutable bufs in send_vectored_with_ancillary_to
LinkTed
committed

Commits on Mar 1, 2021

Use a crate to produce rustdoc tree comparisons instead of the `diff` command
notriddle
committed

Commits on Mar 3, 2021