Summary:
Sharing a document with everyone@ was effective at the api level,
but had two flaws in the web client:
* A logged in user with no access at the org level could not access
a publically shared doc within that org.
* Likewise, for the anonymous user (but for a different reason).
This diff tweaks the web client to permit accessing a doc when
org information is unavailable.
It also changes how redirects happen for the anonymous user when
accessing a doc. They now only happen once it has been confirmed
that the user does not have access to the doc.
Test Plan: added tests
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2591
Summary: This moves enough server material into core to run a home server. The data engine is not yet incorporated (though in manual testing it works when ported).
Test Plan: existing tests pass
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2552
