Update torbrowser import documentation
Originally created by @CyrilBrulebois on #17290 (Redmine)
Following this commit, I think the last part of https://tails.boum.org/contribute/release_process/tor-browser/ should go away?
commit 05db5aaa114245af4211a19438e4d442b058d617
Author: intrigeri <intrigeri@boum.org>
Date: Sun Nov 10 09:54:03 2019 +0000
htpdate: stop sending User-Agent that fakes Tor Browser (refs: tails/tails#12023)
As decided on the "[Tails-dev] Faking htpdate user agent worth it?" thread in
December 2016.