PYTHON-1944 Mark encryption as in beta

Author: ShaneHarvey

pymongo/encryption.py

@@ -12,7 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""Client side encryption."""
+"""Client side encryption.
+
+**Support for client side encryption is in beta. Backwards-breaking changes
+may be made before the final release.**
+"""
 
 import contextlib
 import functools
@@ -344,6 +348,9 @@ def __init__(self, kms_providers, key_vault_namespace, key_vault_client,
         creating data keys. It does not provide an API to query keys from the
         key vault collection, as this can be done directly on the MongoClient.
 
+        .. note:: Support for client side encryption is in beta.
+           Backwards-breaking changes may be made before the final release.
+
         :Parameters:
           - `kms_providers`: Map of KMS provider options. Two KMS providers
             are supported: "aws" and "local". The kmsProviders map values

pymongo/encryption_options.py

@@ -48,6 +48,9 @@ def __init__(self, kms_providers, key_vault_namespace,
         community feature. A MongoClient configured with
         bypassAutoEncryption=true will still automatically decrypt.
 
+        .. note:: Support for client side encryption is in beta.
+           Backwards-breaking changes may be made before the final release.
+
         :Parameters:
           - `kms_providers`: Map of KMS provider options. Two KMS providers
             are supported: "aws" and "local". The kmsProviders map values

pymongo/mongo_client.py

@@ -481,7 +481,9 @@ def __init__(
           - `auto_encryption_opts`: A
             :class:`~pymongo.encryption.AutoEncryptionOpts` which configures
             this client to automatically encrypt collection commands and
-            automatically decrypt results.
+            automatically decrypt results. **Support for client side encryption
+            is in beta. Backwards-breaking changes may be made before the
+            final release.**
 
         .. mongodoc:: connections