Wire correct timeout through

Adding in a couple of comments

Bumping version

Removing config.cmake from .gitignore

Merge branch 'master' into hhvm

Splitting up default_pem_root_certs to be per thread

Closing final memory leak

Closing final memory leak

Merge pull request grpc#11620 from murgatroid99/version_bump_1.4.1

Bump version to 1.4.1

Merge pull request grpc#11567 from muxi/fix-objc-memory-leak-v14

Backport grpc#11521: Fix objc memory leak v14