bug fix disable proxy

Author: justcoding121

Titanium.Web.Proxy/Helpers/SystemProxy.cs

@@ -186,7 +186,7 @@ private static HttpSystemProxyValue parseProxyValue(string value)
                 {
                     HostName = endPoint.Split(':')[0],
                     Port = int.Parse(endPoint.Split(':')[1]),
-                    IsSecure = false
+                    IsSecure = true
                 };
             }
             return null;