Tokenserver points to SYNC_DOCS_URL

[data-sync-user]

We redirect the root path of the services to SYNC_DOCS_URL, whereas tokenserver should probably redirect to e.g. https://mozilla-services.readthedocs.io/en/latest/token/apis.html .

This is a minor nit: maybe we’ll make syncstorage serve tokenserver endpoints sooner rather than later which would make this no longer a bug.

┆Issue is synchronized with this Jira Bug