remnants to be removed in next commit

Endianess is now converted by the raw decoder/encoder.

It seems S24N needs to be kept for the FLAC decoder though.

Preferences set regarding loaded modules only is likely to contain what
the user is looking for.

It never really worked anyway.

The "fullscreen" variable is set by the UI. That triggers a vout
control request. Then the vout thread actually switches to/from
full screen mode. Setting the "fullscreen" variable again then would
trigger a live loop in some circumstances, and should be useless.

libzvbi is LGPL :)

Signed-off-by: Rafaël Carré <funman@videolan.org>

This will skip auto-select of libraries under the GPL

Still documents old behaviour.

(In practice, all of these were only used in little endian anyway.)

There is still a random offset between A/V which stays
constant until there's a flush but hopefully testing should
give a clue how to fix it.

Note: the symbols required are present only since 2.2

Close #7786