[Doc] Correct a known restriction in cephfs_driver
TrivialFix
@@ -488,10 +488,11 @@ export location.
Known restrictions
~~~~~~~~~~~~~~~~~~
-- To communicate with the Ceph backend, a CephFS driver instance
- (represented as a backend driver section in manila.conf) requires its own
- Ceph auth ID that is not used by other CephFS driver instances running in
- the same controller node.
+- A CephFS driver instance, represented as a backend driver section in
+ manila.conf, requires a Ceph auth ID unique to the backend Ceph Filesystem.
+ Using a non-unique Ceph auth ID will result in the driver unintentionally
+ evicting other CephFS clients using the same Ceph auth ID to connect to the
+ backend.
- The snapshot support of the driver is disabled by default. The
``cephfs_enable_snapshots`` configuration option needs to be set to ``True``
