OpenSimMirror/bin/addins/OpenSim.addin.xml

<Addin id="OpenSim" version="0.5" isroot="true">
    <Runtime>
        <Import assembly="../OpenSim.exe"/>
    </Runtime>
    <ExtensionPoint path = "/OpenSim/Startup">
        <ExtensionNode objectType="IApplicationPlugin"/>
    </ExtensionPoint>
</Addin>