MFC r269189:
Initialize zfs vnode v_hash when the vnode is allocated.
MFC r269290, r269291, r269293:

r269290:
  acpi_wmi(4): Remove trailing comma from standalone Xref.

r269291:
  hptiop(4): Remove trailing comma from ending Xref.

r269293:
  kernel_mount(9): Remove trailing comma from ending Xref.

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