Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Directory SyncArea: what it touches
RemovedKind: in v2.1.248,
RemovedSection of the release
What
The directory-sync client no longer has the call that attached a session file to a mount path, along with its upload request and its guard against mount paths the server would reject. The capability is removed, not renamed.
Evidence
dir-sync: refused to attach a session file under a mount path or id the server would reject
Strings lifted out of the shipped bundle, so the claim above can be checked against them.