The cookie is not secure. Depending on the master input (or other
slave inputs), it might be possible for a third party to inject bad
cookies. The caller shall implement appropriate sanity checks.

This introduced way too many bugs.
Close #3297 and "activate-subs hide the video" bug and a few more.
This is way suboptimal, but no fix works in a reliable fashion so far.

Volatile/unsaveable options are now always internal implicitly.

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

This can reportedly be used to overlay HTML content on top of the VLC
widget. That being said, overlay is not a portable option *ahem*.

This is too late to change command line options anyway.

We will print a fatal error afterward anyway.

Yes, I know, I am not using 1.4.1...

Most probably nobody uses this (in VLC context). In fact, it would
cause many existing VLC command line examples /out there/ to fail
mysteriously.

This simplifies the code a little bit and kills a static variable.

Prevent unnecessary memory accumulation when new submenus are
created again and again.

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>