ipset 3.1 release

ipset 3.1 release

A few minor bugs fixed and cleanups:

  - Nonexistent sets were reported as existing sets when testing
    from userspace in setlist type of sets (bug reported by Victor A.
    Safronov)
  - When saving sets, setlist type of sets must come last in order
    to satisfy the dependency from the elements (bug reported by Marty B.)
  - Sparse insists that the flags argument to kmalloc() is gfp_t
    (Stephen Hemminger)
  - Correct format specifiers and change %i to %d (Jan Engelhardt)
  - Fix the definition of 'bool' for kernels <= 2.6.18 (Jan Engelhardt)