Better docs and associated SUCCESS/FAILURE for process::ExitCode#48618

Merged

alexcrichton merged 3 commits intorust-lang:masterfrom

scottmcm:elaborate-exitcode

Mar 8, 2018

Commits on Feb 27, 2018

Put some thought and documentation effort into process::ExitCode
scottmcm
committed

Commits on Mar 1, 2018

Fix linkchecker
scottmcm
committed

Commits on Mar 4, 2018

Move process::ExitCode internals to sys
scottmcm
committed