Add rootflags and ovltmpfsflags to overlaytmpfs
overlaytmpfs, add option
ovltmpfsflags (for the upper tmpfs) and make use of
rootfstype (for underlying rootfs) when set. This would solve #11 as it enables you to pass
If I understand this commit correctly, we'd want to set mode=0755 for an overlaytmpfs either way but let the user override it with
ovltmpfsflags if they wish.
Also force read-only mount of "lowerdir"
root-ro and read-write mount of "upperdir"
root-rw, to mitigate user foot gunnery.
(edited to reflect current state)