httplive: don't reload playlist all the time.
Reload playlist only when there is only 1 or 0 segments left that are downloaded but not played yet. Also change the default interval to be segment length instead of half segment length. With this patch it downloads 3 segments from 5 seglen playlist at the time and then plays those. Should be much nicer on http-server and powersaving (marginally as there isn't network activity that often).
Showing with 5 additions and 4 deletions