Drop time synchronization hacks that tor 0.3.5 and 0.4.x made obsolete
_Originally created by @hefee on [#16471 (Redmine)](https://public-redmine-archive.tails.boum.org/code/issues/16471)_
And here’s a list of little-t-tor changes that might be relevant, e.g.
they may break or time sync hacks or instead make some of them obsolete:
- <https://trac.torproject.org/projects/tor/ticket/28591>
- <https://trac.torproject.org/projects/tor/ticket/24661>
- <https://trac.torproject.org/projects/tor/ticket/23605>
- <https://trac.torproject.org/projects/tor/ticket/27691>
Some of them were fixed in 0.3.5, some will be in 0.4.x but might be
backported to 0.3.5 when we come back to this ticket. As part of this
ticket, I expect we will:
- look for breakage and fix it (subtasks of this ticket + report to
Tor Network Team if the problem is on their side)
- look for changes that make our code useless but not harmful and file
new FT tickets for that (not blockers to close this ticket)
- if it looks like 0.4.x will make a bigger difference, file a ticket
about upgrading to 0.4.x and explain your findings there, so we
don’t do all the exact same work again once we’re there
Feature Branch: bugfix/16471-drop-time-synchronization-hacks+force-all-tests, https://salsa.debian.org/tails-team/tails/merge_requests/21
### Attachments
* [Screenshot_20190516_202417.png](https://redmine.tails.boum.org/code/attachments/download/2347/Screenshot_20190516_202417.png)
* [tor-launcher-clock_skew.png](https://redmine.tails.boum.org/code/attachments/download/2460/tor-launcher-clock_skew.png)
* [tor-launcher-clock_skew.log](https://redmine.tails.boum.org/code/attachments/download/2461/tor-launcher-clock_skew.log)
### Related issues
- **Related to** tails/tails#16348
- [x] **Blocked by** tails/tails#16687
- **Blocks** tails/tails#9256
- [x] **Blocked by** tails/tails#16792
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