On-disk raw send errata

[tcaputi]

System information

Type	Version/Name
Distribution Name	All
Distribution Version	All
Linux Kernel	All
Architecture	All
ZFS Version	0.8.0-rc3

This issue is being created to track an errata relate to raw sends. Currently, it is possible to create an unreadable dataset in zfs by doing a combination of incremental raw and non-raw sends of an encrypted dataset. This sequence of commands should not be allowed to take place, but the check for this requires that we add a new value into the dsl_dataset_t ZAP object and any bookmarks created from encrypted datasets. More info and steps to reproduce the issue can be found in the pull request for the fix (#8308).

[rlaager]

Since #8308 has been fixed, this is done, right?