(should probably be a per-instance lock instead though)

(My fault - fortunately, sout_AccessOutControl was unused)

It also add checks against failed malloc.

The option value should be escaped by \ for the mentionned characters and
only for them (and only one time).

For example
 dst="test \"ok\".mp3"
will assign the value
 test "ok".mp3
to the option dst.

The following one
 dst="c:\test\\'bla'bla.txt"
will assign the value
 c:\test\'bla'bla.txt

You can use the functions
- config_StringEscape (allocates memory)
- config_StringUnescape (does not allocate memory).

It fixes at least SVQ1 segfaults.

This reverts commit 48079eea.
I410 is 9 bits per pel, it is ffmpeg doing something wrong.

Was missing from [629f5752]