OptionalauthorizeOptionalmaxReject PUTs over this size (default 100 MB).
OptionalverifyIf set, server recomputes a sha256 of the body and 409s when it
doesn't match the URL hash. Defaults to false because clients use
fnv128 which is not sha256-compatible.
Optional authorizer. When supplied, every request must pass it before any storage access (GET/HEAD/PUT/DELETE and the
/blobslist). When omitted, traffic is anonymous (dev/tests).startCollabServerwires this from itsauthenticatehook so blobs share the WS auth scheme.