Added `get_address_name`, an interface to `getnameinfo`
Don't promise that we talk about Rustdoc more

Fixes #20088
collections: use Unique in btree::Node
Fix impl of Send and Sync for mips

In f436f9ca2, the Send and Sync traits became `unsafe`. They were updated for `target_arch = x86` and others, but `mips` was missed.
mk: Allow an optional number to come after the beta version label
mk: The beta channel temporarily produced alpha versions
Forbid static methods in object safe traits

Closes #19949 and rust-lang/rfcs#428

[breaking change]

If you have traits used with objects with static methods, you'll need to move
the static methods to a different trait.
Tests
librustc_trans: Remove some dead code now that procs are gone.
PR#20326 : Issue#20322: Adding unsafe Send and Sync traits implementation for RingBuf
Implement `Clone` for a large number of iterators & other adaptors.

It's useful to be able to save state.
iOS: fallout of Sync oibit
Handle function calls to integers in model lexer correctly

closes #15877
Minor change to wording in `Variables and Bindings`

In the context of explaining the declaration of mutable bindings, using 'intended' probably conveys the meaning better than 'cared'.
src/grammar/check.sh now prints test summary
Update src/grammar/README.md
debuginfo: Add a rust-gdb shell script that will start GDB with Rust pretty printers enabled.
Moved ReducedGraphParent building to a new module
mk: The alpha will not have a cycle number
Cleanup unused imports resulting from move of reduced graph building