Security fixes
Upgrade Tor Browser to 9.0.10-build2 (Closes: #17660).
Upgrade Thunderbird to 1:68.7.0-1~deb10u1 (MFSA-2020-14, DSA-4656).
Upgrade Git to 1:2.11.0-3+deb9u3 (DSA-4657, DSA-4659).
Upgrade Node.js to 10.19.0~dfsg1-1 (DSA-4669).
Upgrade OpenLDAP to 2.4.47+dfsg-3+deb10u2 (DSA-4666).
Upgrade OpenSSL to 1.1.1d-0+deb10u3 (DSA-4661).
Upgrade ReportLab to 3.5.13-1+deb10u1 (DSA-4663).
Upgrade WebKitGTK to 2.26.4-1~deb10u3 (DSA-4658).
Bugfixes
Switch Japanese input method from Anthy to Mozc (Closes: #16719).
Install the libu2f-udev package, for U2F device support.
Update our list of 'Favorites' applications (Closes: #16990).
Build system
lint_po: support locales with "@" in their name, such as ru@petr1708
(Closes: #17554).
perl5lib: declare missing test dependencies (Closes: #17591).
iuk: declare missing test dependencies (Closes: #17592).
Upgrade to po4a 0.55 for Zero Trace Pen images and Vagrant box (Closes: #17005).
Test suite
Print disk usage information when the test suite fails with “No
space left” errors.
Ensure no zombie processes are left around, by cleaning subprocesses
correctly (Closes: #17551).
Prevent webrick from becoming a zombie process.
Avoid test suite getting stuck due to a zero timeout.
Fix obsoletion warnings (Closes: #17552).
Add root check and --allow-non-root option (Closes: #17613). Let's
make it clear running the test suite requires root privileges in
the general case.