Merge branch 'cramfs-blocksize' of https://github.com/rudimeier/util-linux

* 'cramfs-blocksize' of https://github.com/rudimeier/util-linux:
  mkfs.cramfs: fix crash when -b 0
  fsck.cramfs: update man page (--extract and --blocksize)
  tests: remove test_fsck.cramfs (reverts 6c32ae78)
  fsck.cramfs: remove define INCLUDE_FS_TESTS
  fsck.cramfs: refactor option -x/--extract
  tests: fix fsck.cramfs for systems with certain page sizes
  fsck.cramfs: add option --blocksize
  fsck.cramfs: rename variable page_size to blksize
  fsck.cramfs: ifdef unused outbuffer and page_size
  fsck.cramfs: allow smaller superblock sizes
  tests, fix cramfs for systems with certain page sizes