[NFS] restore regional video filenames & add an option for customizing filenames (NTSC/PAL)

[xan1242]

This entire block of code from CalculateMovieFilename was omitted from the US build. Should be easy to restore. Just check language first, if the language specific variant exists, play that, else, look for the one without the suffix.

if ( !bStrICmp(a3, "ealogo") )
  {
    v6 = GetCurrentLanguage();
    if ( v6 == 3 )
    {
      v7 = "_it.vp6";
    }
    else if ( v6 > 3 )
    {
      if ( v6 == 5 )
      {
        v7 = "_du.vp6";
      }
      else if ( v6 < 5 )
      {
        v7 = "_sp.vp6";
      }
      else if ( v6 == 6 )
      {
        v7 = "_sw.vp6";
      }
      else
      {
        if ( v6 != 7 )
          goto LABEL_29;
        v7 = "_dn.vp6";
      }
    }
    else if ( v6 == 1 )
    {
      v7 = "_fr.vp6";
    }

[xan1242]

Semi related - also other NFS games have the NTSC/PAL shenanigans going on.

Should also address this because it makes absolutely no sense to keep the distinction on PC.