Peter Hutterer a2d83b9dc8 Xi: add "deletable" flag to properties, add DeleteProperty handler. ...

A property can only be deleted if any of the following is true:
- if a property is deletable and all handlers return Success.
- if a property is non-deleteable and the all handlers return Success AND the
  delete request does not come from a client (i.e. driver or the server).

A client can never delete a non-deletable property.

2008-09-26 13:32:08 +09:30

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