[Bug-wget] Wget 1.20.3 timestamp behavior doesn't match the one described on the manual

[Dalme]

>From the wget manual (at
https://www.gnu.org/software/wget/manual/wget.html#Time_002dStamping):
"If the local file does not exist, or the sizes of the files do not
match, Wget will download the remote file no matter what the time-stamps
say." However, using Wget 1.20.3 it only downloads the remote file when
the sizes do not match if we're using "--no-if-modified-since",
otherwise it doesn't do it. As I've seen Wget 1.16 follows the behavior
described on the manual (that version doesn't have
"--no-if-modified-since").

If I'm right I suppose the manual should be updated