Define interfaces for streaming HTTP requests and responses.
Stop trying to set NOATIME mount flag because kernel will soon disallow this.

The kernel devs have decided it's a security vulnerability for apps to be able to change the atime settings on private bind mounts of filesystems they don't own. Unfortunately instead of just ignoring the offensive flag, mount() will fail.
Tweak comment.
supervisor-main: Fix for stricter remount semantics in Linux 3.17