no-clobber add more suffix

`--no-clobber' is very usfull option, but i retrive document not only with .html/.htm suffix. Make addition option that like -A/-R define all allowed/rejected rules for -nc option.

Re: no-clobber add more suffix

Hi Sergey! -nc does not only apply to .htm(l) files. All files are considered. At least in all wget versions I know of. I cannot comment on your suggestion, to restrict -nc to a user-specified list of file types. I personally don't need it, but I could imagine certain situations were this