Rollup of 11 pull requests#40147

Closed

eddyb wants to merge 31 commits intorust-lang:masterfrom

Commits on Feb 23, 2017

Add missing urls and examples for Condvar docs
GuillaumeGomez
committed

Commits on Feb 25, 2017

Fix nightly-only experimental API display
GuillaumeGomez
committed

Commits on Feb 26, 2017

teach rustc about remove_stable_features and removed no-stack-chech feature. fixes #34915
benschreiber
committed
removed unneeded comment blocks
benschreiber
committed

Commits on Feb 28, 2017