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This makes deletion and appending somewhat more consistent.

And simplify accordingly, notably inline playlist_NodeAppend().

...where applicable. (Some other functions conditionally delete stuff;
those functions can actually fail.)

This makes more sense than returning the input item ID, which is not
exposed in any other place and manner through Lua. And it seems that
was the intent too.

Then again, the value is either way potentially invalid by the time it
is returned.

This removes the longname parameter from the SD configuration chain
generated while probing SD.

This gets the name of the playlist node for a playlist SD from the
SD module intance rather than from a configuration chain. The latter
was a rather ugly hack, and did not work with the command line (-S).

It also fixes localization of the name.

yaw: Left/Right (same a DVD/BR nav)
pitch: Up/Down (same a DVD/BR nav)
fov: Page Up/Page Down
Signed-off-by: Thomas Guillem <thomas@gllm.fr>

Signed-off-by: Thomas Guillem <thomas@gllm.fr>

make sure we use a dummy/portable vout by default in tests.
Signed-off-by: Thomas Guillem <thomas@gllm.fr>

Signed-off-by: Thomas Guillem <thomas@gllm.fr>

Signed-off-by: Thomas Guillem <thomas@gllm.fr>

Signed-off-by: Thomas Guillem <thomas@gllm.fr>