> Why do we need /run?
  > 
  > There is a need for a writable location to store data
  > during early boot, before / is made writable (and it
  > might be read only even during normal operation).
  > Currently, no cross-distribution standardized location
  > exists for this purpose. Debian uses /lib/init/rw; Ubuntu
  > apparently does some very complex stuff linking /var/run
  > to /lib/init/rw and using showthrough mounts. Other
  > distributions do their own thing. Several programs chose
  > not to use /lib/init/rw due to it being non-standard, and
  > continued to use /dev/.foo due to udev mounting a tmpfs
  > there which could be abused as a data store during early
  > boot. /run provides a standard place for these use cases.

So, this is one of those "no user-serviceable parts inside" changes. The purpose is only for developers during bootup.

Would be good, but, let me know if FHS actually accepts this. http://www.pathname.com/fhs/