Merge r261722, r261723, r261724, r261725 from head:
  several minor improvements for UMA_ZPCPU_ZONE zones.
Merge r261796 from head:
  While it isn't too late and kvm_read_zpcpu() function isn't yet used
  outside libkvm(3), change its order of arguments, so that it is the
  same as in kvm_read().
Merge r261805 from head:
  Add kvm_getncpus() to obtain mp_ncpus.
Merge r261582, r261601, r261610, r261613, r261627, r261640, r261641, r261823,
      r261825, r261859, r261875, r261883, r261911, r262027, r262028, r262029,
      r262030, r262162 from head.

  Large flowtable revamp. See commit messages for merged revisions for
  details.

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