MFC r260142: MFV r258972:

4373 add block contents print to zstreamdump
MFC r268075: MFV r267565:

4757 ZFS embedded-data block pointers ("zero block compression")
4913 zfs release should not be subject to space checks
MFC r268079: MFV r267566:

4390 i/o errors when deleting filesystem/zvol can lead to space map
     corruption
MFC r268082: MFV r267567:

4881 zfs send performance degradation when embedded block pointers are
     encountered