Rollup of 7 pull requests#63148

Merged

bors merged 20 commits intorust-lang:masterfrom

Centril:rollup-t813bxw

Jul 31, 2019

Commits on Jul 7, 2019

Add doc links to liballoc crate page
czipperz
committed

Commits on Jul 29, 2019

use gloabl variable 'environ' to pass environments to rtpSpawn
bpangWR
committed

Commits on Jul 30, 2019