Add en-US link for the support portal
The support portal has no explicit `en-US` locale in the URL or the permalinks, for example https://support.torproject.org/tbb/tbb-2/ (compare this with https://support.torproject.org/de/tbb/tbb-2/ for Deutsch).
Would it be possible to add this explicitly? This is helpful for legacy/trac#27558 and will match the URL of the Tor Browser English manual https://tb-manual.torproject.org/en-US/.
So,
https://support.torproject.org/tbb/tbb-2/
should instead be:
https://support.torproject.org/en-US/tbb/tbb-2/
issue