Fix content and spelling of comment on _ipfw_insn.len -- a count of 32-bit words, not 32-byte words.
Fix content and spelling of comment on _ipfw_insn.len -- a count of
32-bit words, not 32-byte words.

MFC after:	3 days

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