MFC r1.72: Partially revert r1.67 which changed maxbcache and maxswzone from int to long without updating the <sys/buf.h> version.  This broke the corresponding tunables on sparc.
MFC r1.72: Partially revert r1.67 which changed maxbcache and maxswzone
from int to long without updating the <sys/buf.h> version.  This broke the
corresponding tunables on sparc.

Approved by:	re (kensmith)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase