Add privacy and ToS links

To be GDPR compliant we need to provide privacy statement. These should
be linked on the index page. So as soon as a document exist under
`public/docs/privacy.md` the link will show up.

Since we already add legal links, we also add Terms of Use, which will
show up as soon as `public/docs/terms-of-use.md` exists.

This should allow everyone to provide the legal documents they need for
GDPR and other privacy and business laws.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

locales/en.json

@@ -105,5 +105,7 @@
 	"Export to Snippet": "Export to Snippet",
 	"Select Visibility Level": "Select Visibility Level",
 	"Night Theme": "Night Theme",
-	"Follow us on %s and %s.": "Follow us on %s, and %s."
-}
+	"Follow us on %s and %s.": "Follow us on %s, and %s.",
+	"Privacy": "Privacy",
+	"Terms of Use": "Terms of Use"
+}