Overhaul HLS streaming (#3274)

* Overhaul HLS streaming
* Fix streaming transcode ffmpeg zombie processes
* Add changelog and release notes
* Documentation
---------
Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

ui/v2.5/src/docs/en/ReleaseNotes/index.ts

@@ -1,4 +1,5 @@
 import v0170 from "./v0170.md";
+import v0200 from "./v0200.md";
 
 interface IReleaseNotes {
   // handle should be in the form of YYYYMMDD
@@ -11,4 +12,8 @@ export const releaseNotes: IReleaseNotes[] = [
     date: 20220906,
     content: v0170,
   },
+  {
+    date: 20230224,
+    content: v0200,
+  },
 ];

ui/v2.5/src/docs/en/ReleaseNotes/v0200.md

@@ -0,0 +1 @@
+The cache directory is now required if using HLS streaming. Please set the cache directory in the System Settings page.