Closes: #17400, #17402

When one has changed files that affect the sidebar, rebuilding is typically
faster than refreshing.

Typically, the RM reaches this step the day before the release,
and we won't import updated translations again until the release,
so let's not pretend that it's still time for translators
to improve stuff for this release.

These calls are not strictly needed but they help every member
of this small git-annex conspiracy to track what is where.

Build system: instead of downloading every localized Tor Browser, use the tarball with all langpacks (refs: #17400)

My goal here is to ensure I import said tarball for 9.0.3 into our Tor Browser
archive tomorrow. This will make it easier to work on #17400 later.

wiki/src/doc/first_steps/persistence/copy.ar.po: updating as wiki/src/doc/first_steps/persistence/copy.de.po has changed.
wiki/src/doc/first_steps/persistence/copy.ca.po: updating as wiki/src/doc/first_steps/persistence/copy.de.po has changed.
wiki/src/doc/first_steps/persistence/copy.id.po: updating as wiki/src/doc/first_steps/persistence/copy.de.po has changed.
wiki/src/doc/first_steps/persistence/copy.pl.po: updating as wiki/src/doc/first_steps/persistence/copy.de.po has changed.
wiki/src/doc/first_steps/persistence/copy.ru.po: updating as wiki/src/doc/first_steps/persistence/copy.de.po has changed.
wiki/src/doc/first_steps/persistence/copy.sr_Latn.po: updating as wiki/src/doc/first_steps/persistence/copy.de.po has changed.
wiki/src/doc/first_steps/persistence/copy.tr.po: updating as wiki/src/doc/first_steps/persistence/copy.de.po has changed.
wiki/src/doc/first_steps/persistence/copy.zh.po: updating as wiki/src/doc/first_steps/persistence/copy.de.po has changed.
wiki/src/doc/first_steps/persistence/copy.zh_TW.po: updating as wiki/src/doc/first_steps/persistence/copy.de.po has changed.
wiki/src/install/expert/usb.ar.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.ca.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.id.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.pl.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.ru.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.sr_Latn.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.tr.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.zh.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.zh_TW.po: updating as wiki/src/install/expert/usb.de.po has changed.

intrigeri authored Nov 16, 2019 and segfault committed Jan 05, 2020

These options are "aimed at preventing possible information leaks and making the
control-flow bugs that depend on uninitialized values more deterministic"¹.
All kmalloc()s effectively become kzalloc()s and all kfree()s effectively become
kzfree()s².

In passing, apart of the defense-in-depth security benefits intended by the
authors of this Linux feature, init_on_free=1 may ensure we clean more kernel
memory at shutdown time.

Benchmarks show:

* a negligible performance hit with init_on_alloc=1
* a 7-25% performance hit with init_on_free=1

Let's see if/how this affects our use cases.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6471384af2a6530696fc0203bafe4de41a23c9ef
[2] https://outflux.net/blog/archives/2019/11/14/security-things-in-linux-v5-3/

I removed them in 7727622d
but segfault rightfully observed that they can be helpful.

… by commit cced26b6.

segfault authored Jan 05, 2020 and intrigeri committed Jan 05, 2020

- Use argparse's "required" parameter instead of checking if the
  argument is None.
- Drop stream parameter from logging.basicConfig because sys.stderr is used by
  default.
- Don't catch exceptions only for printing them to stderr and exiting
  with exit code 1, because that is exactly what happens if an exception
  is not caught.
- Don't use sys.exit(main()) with a main function that doesn't return
  anything.

Clarification wrt. "Don't catch exceptions only for printing them […]": the
behavior _is_ different in that before this commit, we would hide the resulting
stacktrace. But there's no situation in which we expect main() to raise an
exception here, so IMO hiding exceptions was a bug. Thank you for fixing
it :) -- intrigeri

wiki/src/install/expert/usb.ar.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.ca.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.id.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.pl.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.ru.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.sr_Latn.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.tr.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.zh.po: updating as wiki/src/install/expert/usb.de.po has changed.
wiki/src/install/expert/usb.zh_TW.po: updating as wiki/src/install/expert/usb.de.po has changed.