Rollup of 4 pull requests#57991

Closed

Centril wants to merge 10 commits intorust-lang:masterfrom

Commits on Dec 26, 2018

Commits on Jan 26, 2019

use `SOURCE_DATE_EPOCH` for man page time if set
euclio
committed

Commits on Jan 28, 2019

Introduce into_raw_non_null on Rc and Arc
dwijnand
committed