AVideo: OS command injection in on_publish.php execAsync via unescaped m3u8 URL

Summary Type: Classic shell-metacharacter injection. The YPTSocket notification branch in plugin/Live/onpublish.php builds an execAsync command line by string concatenation, single-quoting each argument but never calling escapeshellarg. A ' in any of the three interpolated values $usersid, $m3u8,...