17.0.8 replaced

As suspected, Mozilla respun 17.0.8 due to an incomplete security fix (but not the "Reddit 0-day" -- we're not actually vulnerable, only old versions). Analysis shows this is cross-platform code and we can also be compromised by the incomplete patch, so I replaced 17.0.8 with new versions. If you are using 17.0.8, please grab it again, or your version will not have the fix. Same changesets from 17.0.7 apply. This will become live shortly along with our newest translation, Asturian (thanks to mikelglez for the work, and, as always, Chris T for coordinating our localizers).