Auto merge of rust-lang#30883 - Manishearth:rollup, r=Manishearth

- Successful merges: rust-lang#30626, rust-lang#30662, rust-lang#30770, rust-lang#30801, rust-lang#30818, rust-lang#30823, rust-lang#30828, rust-lang#30835, rust-lang#30837, rust-lang#30839, rust-lang#30845, rust-lang#30848, rust-lang#30850, rust-lang#30851, rust-lang#30863
- Failed merges:

1.5.0 release

1.4.0 release

1.3.0 release

1.2.0 release

1.1.0 release

1.0.0 release

1.0.0-alpha.2 release

1.0.0-alpha release