Edited 2.2.0-rc0 release notes.

Author: rstam

Release Notes/Release Notes v2.2.0.md

@@ -1,16 +1,18 @@
-# .NET Driver Version 2.2.0-beta Release Notes
+# .NET Driver Version 2.2.0-rc0 Release Notes
 
 (Preliminary)
+This is a release candidate. It is not recommended for production use.
 
-This is a minor release which supports all MongoDB server versions since 2.4.
+This is a minor release which supports all MongoDB server versions from 2.4 through the upcoming
+3.2 release.
 
 An online version of these release notes is available at:
 
 https://github.com/mongodb/mongo-csharp-driver/blob/master/Release%20Notes/Release%20Notes%20v2.2.0.md
 
 The full list of JIRA issues resolved in this release is available at:
 
-{insert link here}
+https://jira.mongodb.org/issues/?jql=project%20%3D%20CSHARP%20AND%20status%20in%20(Resolved%2C%20Closed)%20AND%20fixVersion%20%3D%202.2%20ORDER%20BY%20key%20ASC
 
 Documentation on the .NET driver can be found at:
 
@@ -19,8 +21,22 @@ http://mongodb.github.io/mongo-csharp-driver/
 
 ## New Features
 
-Notable new features are listed below. For a full list, see the full list of JIRA issues linked above.
+Notable new features are listed below. For a full list, see the list of JIRA issues linked above.
 
+### Sync API
+
+The 2.0 and 2.1 versions of the .NET driver featured a new async-only API. Some users gave us feedback
+that they wanted a choice whether to use a sync or an async API. Version 2.2 introduces sync versions
+of every async method.
+
+### Support for server 3.2
+
+- Support for bypassing document validation for write operations on collections where document validation
+has been enabled
+- Support for write concern for FindAndModify methods
+- Support for read concern
+- Builder support for new aggregation stages and new accumulators in $group stage
+- Support for version 3 text indexes
 
 ## Upgrading