* Team upload.
* The previous fix-file-permissions-on-compression.patch almost closed the
window of the race condition, but not completely. This patch, adapted from
upstream, 0017-fix-file-permissions-on-compression.patch, replaces the
previous attempt by erasing the umask before opening the destination file. Closes: #982519
[dgit import unpatched libzstd 1.3.8+dfsg-3+deb10u2]