replace doxygen footer for older doxygen version
replace doxygen footer for older doxygen version

yangf4/core,YetAnotherMinion/core,yangf4/core,YetAnotherMinion/core,yangf4/core,yangf4/core,YetAnotherMinion/core,YetAnotherMinion/core,yangf4/core,YetAnotherMinion/core