tar(1) man page and URLs

In the tar(1) man page: http://www.gnu.org/software/tar/manual (twice). The https version would be more secure. And at the end: License GPLv3+: GNU GPL version 3 or later The URL should not be broken on 2 lines, and it should be updated to

tar doesn't restore all directory timestamps from the extracted archive

With some archives, like /usr/src/linux-source-5.10.tar.xz in Debian, tar doesn't restore all the directory timestamps from the extracted archive. This is not an incremental archive, but the list of files were provided in input at the .tar creation in an order not compatible with the algorithm desc