Notable upstream pull request merges:
  #11652 Split dmu_zfetch() speculation and execution parts
  #11682 Fix zfs_get_data access to files with wrong generation
  #11735 Clean up RAIDZ/DRAID ereport code
  #11737 Initialize metaslab range trees in metaslab_init
  #11739 FreeBSD: make seqc asserts conditional on replay
  #11763 Allow setting bootfs property on pools with indirect vdevs
  #11767 FreeBSD: Fix memory leaks in kstats