zfsonlinux/zfs@master will support online defragmentation of ZFS pools before 2019

Created by PseudonymousUser on 2016-10-06; known on 2019-01-01; judged wrong by PseudonymousUser on 2019-01-01.

• PseudonymousUser estimated 14% on 2016-10-06
• PseudonymousUser said “I don’t see any defragmentation or block pointer rewrite PRs” on 2019-01-01
• PseudonymousUser   judged this prediction wrong on 2019-01-01.