qvm-device.rst: Document '--ro' option

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Rusty Bird 2018-01-10 21:57:54 +00:00
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@ -59,6 +59,11 @@ Attach the device with *DEVICE_ID* from *BACKEND_DOMAIN* to the domain *VMNAME*
specify this option multiple times. See below for options specific to
different device classes.
.. option:: --ro
Alias for the `read-only=yes` option. If you specify both `--ro` and
`--option read-only=no`, `--ro` takes precedence.
.. option:: --persistent, -p
Attach device persistently, which means have it attached also after qube restart.