DOCS-15196 v4.2 (#1342)

* DOCS-15196 add default mongocryptd port

* add mongocrupt binary link

* verbiage updates

Author: ianf-mongodb

source/reference/default-mongodb-port.txt

@@ -36,3 +36,11 @@ The following table lists the default TCP ports used by MongoDB:
        :option:`--configsvr <mongod --configsvr>` command-line option or
        the ``configsvr`` value for the :setting:`~sharding.clusterRole`
        setting in a configuration file.
+
+   * - ``27020``
+
+     - The default port from which ``mongocryptd`` listens for 
+       messages. ``mongocryptd`` is installed with `MongoDB Enterprise 
+       Server (version 4.2 and later) 
+       <https://www.mongodb.com/download-center/enterprise>`__ and 
+       supports automatic encryption operations.