Comment 10 for bug 1902588

This commit that introduced the segfault was applied o the 0.8-release branch with https://github.com/openzfs/zfs/commit/95fcb04215015950b3388ba0a6edad8e1b463415 so Focal and Groovy are affected.

That change was never applied to the 0.6.5-release or 0.7-release branches, so Bionic and Xenial aren't affected.