Clarify builtin configuration
Clarify builtin configuration

fedora-java/xmvn,mizdebsk/xmvn,mizdebsk/xmvn,rvais/xmvn,mizdebsk/xmvn,rvais/xmvn,rvais/xmvn,rvais/xmvn,fedora-java/xmvn,fedora-java/xmvn,mizdebsk/xmvn