[PATCH] fs: Add 'rootfsflags' to set rootfs mount options

[Lichen Liu]

Hi Rob,

Thanks for your help with testing and for answering Dave's question in detail!

Your "history time" here is fantastic and explains the reasoning
perfectly, it is very interesting and I believe it could be part of a
publication.

Based on this discussion, it seems the patch is heading in the right
direction. Please let me know if there are any other concerns.

Thanks!
Lichen