Minor improvements and updates
- Install Mesa and libdrm* from stretch-backports and upgrade the Nouveau
X.Org video driver to 1.0.15. This improves support for some graphics
cards such as NVIDIA Pascal series (Closes: #14910)
- htpdate: improve diagnostics output when the date header can't be fetched.
- Onion Grater: support named AppArmor profiles.
- Update Onion Grater's config for new Tor Browser AppArmor profile name.
- Enable e10s in the Unsafe Browser.
- Delete all search plugins for the Unsafe Browser (Closes: #15708).
- Display a deprecation warning when starting Liferea (#11082).
- Upgrade VirtualBox guest modules to 5.2.16-dfsg-3~bpo9+2.
- Use Tor Browser for browsing the documentation even when offline
(Closes: #15720).
- Provide feedback while Tor Browser, "Zero Trace Pen documentation"
or "Report an error" are starting (Closes: #15101).
- WhisperBack: remove the right pane (Closes: #7180).
- zerotracepen-debugging-info: return machine-readable, structured data.
Adjust WhisperBack accordingly (Closes: #8514). This paves the way
towards more usable bug reports (#8722).
- Port lots of our Perl code to more lightweight libraries.
This decreases the amount of memory used by the persistence
configuration interface.
- Do not hide applications that require an admin password (Closes: #11013).
- Try unlocking every persistent volume when multiple ones are
available (Closes: #15653).
- Upgrade Electrum to 3.1.3-1~bpo9+1.
- Upgrade most firmware to 20180518-1.
- Upgrade Intel microcode to 3.20180703.2~bpo9+1.
- Upgrade AMD microcode to 3.20180524.1.