This update for gstreamer-plugins-bad fixes the following issues:

- Update to version 1.16.3:
- CVE-2021-3185: buffer overflow in gst_h264_slice_parse_dec_ref_pic_marking() (bsc#1181255)
- amcvideodec: fix sync meta copying not taking a reference
- audiobuffersplit: Perform discont tracking on running time
- audiobuffersplit: Specify in the template caps that only interleaved audio is supported
- audiobuffersplit: Unset DISCONT flag if not discontinuous
- autoconvert: Fix lock-less exchange or free condition
- autoconvert: fix compiler warnings with g_atomic on recent GLib versions
- avfvideosrc: element requests camera permissions even with capture-screen property is true
- codecparsers: h264parser: guard against ref_pic_markings overflow
- dtlsconnection: Avoid segmentation fault when no srtp capabilities are negotiated
- dtls/connection: fix EOF handling with openssl 1.1.1e
- fdkaacdec: add support for mpegversion=2
- hls: Check nettle version to ensure AES128 support
- ipcpipeline: Rework compiler checks
- interlace: Increment phase_index before checking if we're at the end of the phase
- h264parser: Do not allocate too large size of memory for registered user data SEI
- ladspa: fix unbounded integer properties
- modplug: avoid division by zero
- msdkdec: Fix GstMsdkContext leak
- msdkenc: fix leaks on windows
- musepackdec: Don't fail all queries if no sample rate is known yet
- openslessink: Allow openslessink to handle 48kHz streams.
- opencv: allow compilation against 4.2.x
- proxysink: event_function needs to handle the event when it is disconnecetd from proxysrc
- vulkan: Drop use of VK_RESULT_BEGIN_RANGE
- wasapi: added missing lock release in case of error in gst_wasapi_xxx_reset
- wasapi: Fix possible deadlock while downwards state change
- waylandsink: Clear window when pipeline is stopped
- webrtc: Support non-trickle ICE candidates in the SDP
- webrtc: Unmap all non-binary buffers received via the datachannel