Cc: current-users@netbsd.org
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   Date: Tue, 01 Nov 1994 12:02:27 -0500
   From: "Chris G. Demetriou" <cgd@alpha.bostic.com>

   > Probably it should use 4 instead of sizeof(u_long), in fact.

   sizeof(u_int32_t) rather than 4, even...  8-)

Perhaps we need to define a new constant SIZE_IN_BYTES_OF_A_FOUR_BYTE_QUANTITY.
That seems safest.