Identity/get and EmailSubmission were sent without
urn:ietf:params:jmap:submission, and all address book calls were sent with
the mail instead of the contacts capability. Stalwart rejects such calls
with unknownMethod since 0.16.x, which breaks the account bootstrap
(GET /groupware/accounts) and the address books.
Also use the calendar type for creating, updating and deleting calendars
(same capability, no change in behaviour).
tammi-23
435463af41