To 4.0, 2.0 and 1.0

There should be no functionnal change here

Cross has a meaning for closing a menu, window.
Quit action closes everything (quits application).

- Fixes detection when spidf is available again, and resumes playing in spdif mode
  if this was selected before
- Fixes audio device list rebuilt if no audio is playing

refs #8286

Removes locale fix and conditionally builds fingerprinter.

Shortest ones are the best.

Directly assign the given subdirectories to the application folder.

File is read when the segment is opened and values from file
are taken in the use. This and previous patch allows to change
encryption key/uri on the fly.

There is widespread use of words related to term synchronization
in VLC project. Also, common mistake is dropping letter H from
such words. This commit addresses this issue with exception of
not introducing letter H to word [sS]ync, thou [sS]ynch is also
correct, but really rarely used.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>