Changes from version 5 to version 5.1
-------------------------------------
  - fixed copy on write (ifs_copy_file did not work on 0.99.14 kernel)



Changes from version 4 to version 5
-----------------------------------

  - fixed hang when trying to access inherited devices
  - fixed ftruncate bug
  - protected mount data structure by a magic number
  - added mount option "cache" to enable naive caching (undocumented and
    untested)
  - removed bogus warning when reading a socket inode
  - several minor bug fixes