Hey Ondra, Matej,
Here is the thread on the wildfly-dev@lists.jboss.org email list that is discussing the legacy migration functionality from the wildfly side of things.
As you continue to build the server-migration functionality, could you two please stay familiar with what is happening here and provide your thoughts and ideas on what, if anything, we can use from this, and any changes you think we might need them to make in order to make use of it?http://wildfly-development.1055759.n5.nabble.com/Management-operation-for-legacy-subsystem-migration-td5715801.html
Thank you,Lincoln--