As we wwwoffle users all might know, wget has -c, --continue resume getting a partially-downloaded file. Quite handy when a large download got interrupted. However there are some caveats when using it thru wwwoffle. It would be neat if the right combination of wget switches could be known for doing this without causing wwwoffle to get the whole file again, and without resorting to -Y off, bypassing wwwoffle.
Another case is where we get the partially downloaded (larva, pupa, whatever) file out of the wwwoffle cache by hand and rename it to wget expects, and continue with wget -Y off -c. Wget doesn't know that there is a HTTP header swelling the file, so that must first be chopped off. There are other considerations too probably.
