[PATCH wayland 2/2] protocol: Add DnD actions

[Bill Spitzak]

What does "ask" mean?

I would think "ask" is implied by the fact that more than one action is
provided. Maybe an explanation as to what the drop target should do with
these combinations and how they differ from each other (just write what the
drop target should do for each):

 MOVE
 MOVE+ASK
 MOVE+COPY
 MOVE+COPY+ASK
 0 (ie no action)
 ASK

For an example of what I am looking for, here is my best guess that
actually makes ask mean anything:

 MOVE
    do a move without any user interaction
 MOVE+ASK
    do a move, but ui allowing choice of overlapping drop targets is allowed
 MOVE+COPY
    must choose move or copy without user interaction
 MOVE+COPY+ASK
    must choose move or copy but can use user interaction
 0 (ie no action)
    error
 ASK
    error
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