AwsS3Endpoints.java: Added Canada (Central) to the list. (#495)

Author: koolhead17

api/src/main/java/io/minio/AwsS3Endpoints.java

@@ -50,8 +50,10 @@ enum AwsS3Endpoints {
     endpoints.put("us-west-2", "s3-us-west-2.amazonaws.com");
     // us-east-1
     endpoints.put("us-east-1", "s3.amazonaws.com");
-    // use-east-2
+    // us-east-2
     endpoints.put("us-east-2", "s3-us-east-2.amazonaws.com");
+    //ca-central-1
+    endpoints.put("ca-central-1", "s3.ca-central-1.amazonaws.com");
     // cn-north-1
     endpoints.put("cn-north-1", "s3.cn-north-1.amazonaws.com.cn");
   }