Fix buffer limit spec
Manually attach file to loopback device

If this is done automatically, /etc/mtab contains the file instead of
the loopback device, breaking src/repquota/repquota.
Change network seed address for specs
Mount cgroup mounts in /tmp/warden
Setup file system using RO/RW bind mounts on non-Ubuntu systems
Inline string options in wshd_t
Remove unused field
Exec wshd in context of the container
Close other side of pipe after using barrier
Skip cgroup.clone_children
Build static binaries
Mention why custom repquota is included