How to use the ecs Xtra?
1. We have to create our own ecs library or to use an already created one.
2. We copy this library to the folder xtras.
3. In the file eClever.config we add to the section socket-server / xtras name of such ecs library and name under which we will call this extension from our applications.
4. In the domains where we want to allow using of the extension we have to insert in the file eClever.config and section domain names of all the extensions to the atribute xtras, for example xtras="test1#test2".