OpenSSL's Configure script is missing a shebang. On some platforms,
execve falls back to execution with the shell. Some other platforms,
like musl, will fail with an exec format error. Avoid this by calling
perl explicitly (since it's a perl script).

This eliminates some warnings

Fixes rust-lang#44429.

…ulating CrateStore access in tcx.

This commit removes the `cstore_untracked` method, making the `CrateStore` trait
object entirely private to the `ty/context.rs` module.

So that you can scroll down the list of labels along with these
explanations.

Explicitly run perl for OpenSSL Configure

OpenSSL's Configure script is missing a shebang. On some platforms,
execve falls back to execution with the shell. Some other platforms,
like musl, will fail with an exec format error. Avoid this by calling
perl explicitly (since it's a perl script).

…etMisdreavus

rustdoc: Don't counts ids twice when using --enable-commonmark

cc @GuillaumeGomez
r? @QuietMisdreavus

…=frewsxcv

Clarify the behavior of UDP sockets wrt. multiple addresses in `connect`

CC @frewsxcv rust-lang#22569 rust-lang#44209

…aelwoerister

rustc: Make `CrateStore` private to `TyCtxt`

This commit makes the `CrateStore` object private to the `ty/context.rs` module and also absent on the `Session` itself.

cc rust-lang#44390
cc rust-lang#44341 (initial commit pulled and rebased from here)

…richton

update mdbook

This eliminates some warnings

r? @alexcrichton

…ewsxcv

Add doc example to String::as_mut_str

Fixes rust-lang#44429.

Add short doc examples for str::from_utf8_mut

Fixes rust-lang#44462

…on, r=Mark-Simulacrum

Update label explanations

Some of the newer labels weren't covered in CONTRIBUTING.md :)

r? @Mark-Simulacrum