Merge branch 'more_fallocate_tests' of https://github.com/cgoesche/util-linux-fork

* 'more_fallocate_tests' of https://github.com/cgoesche/util-linux-fork:
  fallocate: (man) mention supported file systems for --insert-range
  tests: (fallocate) add --zero-range and --keep-size test
  tests: (fallocate) add --punch-hole test
  tests: (fallocate) --insert-range test