o Reduce userland inclusion of kernel headers -- remove unneeded include   of <sys/mbuf.h>.
o Reduce userland inclusion of kernel headers -- remove unneeded include
  of <sys/mbuf.h>.

Reviewed by:	jlemon

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