Fixed: Reverted in-memory signalr keypair in favor of a .config directory (#722)

src/NzbDrone.Host/Owin/MiddleWare/SignalRMiddleWare.cs

@@ -1,6 +1,7 @@
 using System;
 using Microsoft.AspNet.SignalR;
 using NzbDrone.Common.Composition;
+using NzbDrone.Common.EnvironmentInfo;
 using NzbDrone.SignalR;
 using Owin;
 
@@ -14,7 +15,6 @@ namespace NzbDrone.Host.Owin.MiddleWare
         {
             SignalRDependencyResolver.Register(container);
             SignalRJsonSerializer.Register();
-            SignalRProtectedData.Register();
 
             // Half the default time (110s) to get under nginx's default 60 proxy_read_timeout
             GlobalHost.Configuration.ConnectionTimeout = TimeSpan.FromSeconds(55);