Fix up changelog and docs for 3.9.0 release

Author: behackett

doc/api/pymongo/encryption_options.rst

@@ -1,5 +1,8 @@
-:mod:`encryption_options` -- Options to configure client side encryption
-========================================================================
+:mod:`encryption_options` -- Support for automatic client side encryption
+=========================================================================
 
 .. automodule:: pymongo.encryption_options
-   :members:
+   :synopsis: Support for automatic client side encryption
+
+   .. autoclass:: pymongo.encryption_options.AutoEncryptionOpts
+      :members:

doc/changelog.rst

@@ -11,6 +11,12 @@ Version 3.9 adds support for MongoDB 4.2. Highlights include:
 - New method :meth:`pymongo.client_session.ClientSession.with_transaction` to
   support conveniently running a transaction in a session with automatic
   retries and at-most-once semantics.
+- Initial support for client side field level encyption. See the docstring for
+  :class:`~pymongo.mongo_client.MongoClient`,
+  :class:`~pymongo.encryption_options.AutoEncryptionOpts`,
+  and :mod:`~pymongo.encryption` for details. **Note: Support for client side
+  encryption is in beta. Backwards-breaking changes may be made before the
+  final release.**
 - Added the ``max_commit_time_ms`` parameter to
   :meth:`~pymongo.client_session.ClientSession.start_transaction`.
 - Implement the `URI options specification`_ in the
@@ -68,8 +74,9 @@ Version 3.9 adds support for MongoDB 4.2. Highlights include:
   the buffer protocol.
 - Resume tokens can now be accessed from a ``ChangeStream`` cursor using the
   :attr:`~pymongo.change_stream.ChangeStream.resume_token` attribute.
-- Connections now survive primary step-down. Applications should expect less
-  socket connection turnover during replica set elections.
+- Connections now survive primary step-down when using MongoDB 4.2+.
+  Applications should expect less socket connection turnover during
+  replica set elections.
 
 Unavoidable breaking changes:
 

pymongo/encryption.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""Client side encryption.
+"""Support for explicit client side encryption.
 
 **Support for client side encryption is in beta. Backwards-breaking changes
 may be made before the final release.**

pymongo/encryption_options.py

@@ -12,7 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""Options to configure client side encryption."""
+"""Support for automatic client side encryption.
+
+**Support for client side encryption is in beta. Backwards-breaking changes
+may be made before the final release.**
+"""
 
 import copy
 

pymongo/mongo_client.py

@@ -479,11 +479,11 @@ def __init__(
           | (If not set explicitly, client side encryption will not be enabled.)
 
           - `auto_encryption_opts`: A
-            :class:`~pymongo.encryption.AutoEncryptionOpts` which configures
-            this client to automatically encrypt collection commands and
-            automatically decrypt results. **Support for client side encryption
-            is in beta. Backwards-breaking changes may be made before the
-            final release.**
+            :class:`~pymongo.encryption_options.AutoEncryptionOpts` which
+            configures this client to automatically encrypt collection commands
+            and automatically decrypt results. **Support for client side
+            encryption is in beta. Backwards-breaking changes may be made
+            before the final release.**
 
         .. mongodoc:: connections