host: Cleanup better

Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>
host: Fix containerinit connect retries

Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>
util/release: Implement upload command

Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>
pkg/exec: Close pipes in Wait

Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>