Update comment on INP_TIMEWAIT to say what it's about, as we caution regarding the misplacement of flags in inp_vflag in an earlier comment.
Update comment on INP_TIMEWAIT to say what it's about, as we caution
regarding the misplacement of flags in inp_vflag in an earlier comment.

MFC after:	pretty soon

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