Strip additional hosts in the connection string

asyncio_mongo/connection.py

@@ -30,6 +30,14 @@ class Connection:
         connection = cls()
 
         connection.host = host
+
+        # strip any additional hosts in the connection string for now
+        try:
+            if "," in port:
+                port = port[:port.find(',')]
+        except TypeError:
+            pass
+
         connection.port = port
         connection._loop = loop
         connection._retry_interval = .5