Set EnableHttps disabled by default

Prevents issues on first setup when behind a reverse proxy. Also
prevents issues saving the Networking page by default if SSL is not
fully configured.

MediaBrowser.Model/Configuration/ServerConfiguration.cs

@@ -248,7 +248,7 @@ namespace MediaBrowser.Model.Configuration
             PublicHttpsPort = DefaultHttpsPort;
             HttpServerPortNumber = DefaultHttpPort;
             HttpsPortNumber = DefaultHttpsPort;
-            EnableHttps = true;
+            EnableHttps = false;
             EnableDashboardResponseCaching = true;
             EnableCaseSensitiveItemIds = true;