Upstream changes

• filesystem df: add json output
• qgroup show: add json output
• new command: 'inspect-internal map-swapfile' to check swapfile and its swapfile_offset value used for hibernation
• corrupt-block: fix parsing of option --root argument
• experimental (interfaces not finalized):
  • new command 'inspect-internal list-chunks'
  • new group reflink, command clone
• other:
  • synchronize some files with kernel versions
  • docs updates
  • build: use gnu11

Build changes

• Use libgcrypt for crypto instead of built-in code