Update. Many links look different but the sever redirects them to the same
document with suffix #abc or so. For instance: comm123 ->
path/to/file#comm123. HTTrack processes commNNN as different documents with
names like path/to/file#NNN.html instead of path/to/file.html. This leads to
generating many unwanted files and increases network load. I think anchor tags
need to be recognized and not be appended to the filename, they should only be
added to href links embedded in html documents.