supportinfo: use static IIDs as previous method wouldn't work in a multithreaded environment

* modules/codec/x264.c: H.264 level options patch by Ilkka Ollakka <ilkka dot ollakka a t oamk dot fi>. add options aud, sps-id. deprecate options analyse and filter for partitions and deblock.

* modules/demux/mpeg/mpga.c: oups, no need to free p_sys->p_block_in as it is freed by the packetizer.

- added missing video.toggleFullscreen() API

* Don't skip SPS/PPS after all. Apparently there is sometimes proper data behind such a NAL, which makes this break. Unfortunately there doesn't seem to be a way to properly skip data in the mp4 mux.