Minor refactoring to get http prefixes
Minor refactoring to get http prefixes

very minor refactoring to move the putting together of http prefixes
into a single function.

Pengwyns/Emby.Plugins,hamstercat/Emby.Plugins,SvenVandenbrande/Emby.Plugins,SvenVandenbrande/Emby.Plugins,Pengwyns/Emby.Plugins,lalmanzar/MediaBrowser.Plugins,SvenVandenbrande/Emby.Plugins,lalmanzar/MediaBrowser.Plugins,hamstercat/Emby.Plugins,heksesang/Emby.Plugins,heksesang/Emby.Plugins,MediaBrowser/Emby.Plugins,MediaBrowser/Emby.Plugins,heksesang/Emby.Plugins