archive() listing files and folders from online archive takes as much time as for downloading it

[pakom]

This is related to #85.

When listing the files and folders in an archive on the web using the archive() function, the time spent is the same as for downloading the archive. Consider the following:

library(archive)

options(timeout = 500000000000000000000000)

archive(file = "https://iea.nl/sites/default/files/data-repository/TIMSS/TIMSS2019/TIMSS2019_IDB_SPSS_G8.zip")

The time taken to list the files and folders in the archive is close to 10 minutes, the same time is needed to download the entire ZIP.

The issue in #85 (now closed after PR #94 from @allenluce, thank you once again) was the same. I don't speak C++, but I guess similar approach can be used to fix this one.