Replace myStream with mystream.stream.
Create a text file in the edge content folder with that name and extension. mystream.stream (make sure there is not .txt extension added by text editor and that it is plain text)
Make the contents of mystream.stream something like this:
Then start the stream on the edge use StreamManager or /conf/StartUpStreams.xml to start stream name "mystream.stream" with MediaCaster type "liverepeater"
playback URL in iOS:
Also, change the StreamType from "liverepeater-edge" to "live" on the edge, so ensure StreamManager has full control.