From my reading of the ecore fd handler code, returning
ECORE_CALLBACK_CANCEL from the handlers callback does the same as
ecore_main_fd_handler_del(), which is to mark the handler for deletion,
not actually do the deletion.  The deletion actually happens at some
later point.  So it seems to be safe to do both, or to not have to do
both.

If this is true, I think it's important to document this subtlety.
Other callbacks might have the same property.

-- 
A big old stinking pile of genius that no one wants
coz there are too many silver coated monkeys in the world.

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