WS/MP4 reliability edits:

- Stream selecting now obeys new "maxdelay" capa entry
- Output::liveSeek now takes an optional bool argument to indicate only rate control should be applied (no seeking)
- dataWaitTimeout is now configurable per-output, defaults to the old 25s
- WS/MP4 uses the new liveSeek with rate-control only
- WS/MP4 uses the new dataWaitTimeout and sets it to 4.5s
- WS/MP4 uses the new maxdelay capa, sets it to 5s
- WS/MP4 will now auto-reselect tracks if a track is dropped for data wait timeout or disappeared from metadata reasons
- Added support for jitter information in WS/MP4 protocol
- Robustify sendWebsocketCodecData being ran when sendHeader is ran
- Fix race condition when switching video tracks before previous video track has sent a single frame

lib/dtsc.cpp

@@ -2294,7 +2294,7 @@ namespace DTSC{
             MEDIUM_MSG("Jitter lowered from %" PRIu64 " to %" PRIu64 " ms", maxJitter, curJitter);
             maxJitter = curJitter;
           }
-          curJitter = maxJitter*0.75;
+          curJitter = maxJitter*0.90;
         }
         ++x;
         trueTime[x % 8] = curMs;