Refine pf_check_proto_cksum() a bit in order to avoid additional in_pseudo() calls further down the stack. If we find the cksum to be okay we pretend that the hardware did all the work and hence keep the upper layers from checking again.
Refine pf_check_proto_cksum() a bit in order to avoid additional in_pseudo()
calls further down the stack. If we find the cksum to be okay we pretend
that the hardware did all the work and hence keep the upper layers from
checking again.

Submitted by:	Pyun YongHyeon

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