Merge #1511

1511: Document more things r=asomers a=asomers

Also, test rustdoc in CI, and demote missing_docs from a deny to a
warning (but still deny it in CI).

Co-authored-by: Alan Somers <asomers@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 9e48fc0c..fe0d3b52 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ targets = [
 ]
 
 [dependencies]
-libc = { git = "https://github.com/rust-lang/libc", rev = "f5e31f208", features = [ "extra_traits" ] }
+libc = { git = "https://github.com/rust-lang/libc", rev = "621a95373", features = [ "extra_traits" ] }
 bitflags = "1.3.1"
 cfg-if = "1.0"