unbind & close the stream of newly created LDAP connections after
auth, which might prevent some of the resource leaking we've got going
on
i did actually verify in sly that this still works. yay.
Change-Id: I92c8ca20de642585ae4c24aa455d051ee6e44a87
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5193
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>