• mkfs: new option --inode-flags to specify flags/attributes for inodes/directories/subvolumes
• check:
  • fix false alert on missing checksum for hole
  • in lowmem mode, fix false alerts when checking refs
• convert: check feature compatibility when enabling block-group-tree
• tune convert-bgt: fix resume of conversion
• rescue: add new command fix-data-checksum, selectively fix or find mismatching checksums
• other:
  • new and updated tests
  • documentation updates