close ZeroConf object when exiting the Service Discovery window.
(otherwise pythonw.exe does not exit when closing Beremiz on Windows)
<?xml version="1.0" encoding="UTF-8"?>
<BeremizRoot URI_location="LOCAL://">
<TargetType>
<Win32 CFLAGS="" Linker="g++" LDFLAGS=""/>
</TargetType>
</BeremizRoot>