update README for handler changes
file_optical is the only type1 tcmu-runner handler now.
@@ -85,14 +85,14 @@ handler sees all SCSI commands, there are helper functions provided
that save each handler from writing boilerplate code for mandatory
SCSI commands, if desired.
-The `qcow` and `file` handlers are examples of this type.
+The `file_optical` handler is an examples of this type.
With the option 2, tcmu-runner is in charge of the event loop and SCSI command
handling for your plugin, and your handler's registered functions are called
repeatedly to handle storage requests as required by the upper SCSI layer, which
will handle most of the SCSI commands for you.
-The `glfs` and `rbd` handlers are examples of this type.
+The `file_example` handler is an example of this type.
##### tcmulib
