refs #6814

The main window may be asked to update its content prior to VLCFSPanel being fully initialized

Some filters and outputs rely on the samples count (which was correct),
others on the bytes size (which was not), accounting for why decoding
failed only in some combinations.

That is recommended by MSDN. Also, do not use 0 for NULL.

It is not needed anymore since ce652138 , parsing will
stop at first unrecognized character (like \r or \n)

This affects: .opus, .ogx, .wtv, .rec, .vro, .tod and .mks

This avoids grey or transparent flashes on start

Note that this commit will break some stuff for non-embedded cases, for now.

refs #6814

Quoting the reporter:
| According to include/vlc_access.h, access_t.psz_location is "URL with
| the scheme stripped". But in http module, schema stays there after
| 302 redirection. That may cause httplive module try to access URL like
| "http://http://host/path".
Pointed-out-by: bbcallen <bbcallen@gmail.com>

If a certificate does not validate, the user will be given the option
to accept it manually. GnuTLS will then store the certificate in its
known hosts database.

This will be used for fine-grained GnuTLS stored public keys,
i.e. SSH-like authentication on first use.

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

Close #7529