OS-2349 /etc/profile executes /usr/sbin/quota, which is O(mountpoints)
IMGAPI-95: imgadm create & imgadm publish (for non-KVM images and VMs)

This reverts commit 374414f229a2fe6e7c767d19636bd6eeae37317e, which
reverted the original add due to OS-2323.
OS-2323 hang in 'imgadm import ... IMAGE-UUID'
OS-2353 add support for mounting /checkpoints for joyent and joyent-minimal
Merge branch 'master' of git://github.com/joyent/smartos-live into ec