DOCSP-36050 mongosync restarts with different source or destination cluster (#386)

Author: ajhuh-mdb

source/release-notes/1.8.txt

@@ -52,6 +52,9 @@ Other Changes:
 
 - ``mongosync`` now sends hostnames as telemetry.
 
+- ``mongosync`` now exits with an error if it stops and restarts with a
+  different source or destination cluster than previously specified. 
+
 - Improved performance of the initialization process by eliminating 
   the creation of unnecessary dummy indexes. ``mongosync`` now creates 
   dummy indexes for sharded collections only if the destination