upmpdcli: Add init and config files
upmpdcli: Install config and init files
libupnpp: Remove libstdcxx hack
libupnpp: Add libstdc++ dependency
mpg123: add Makefile for binary and libraries
mpg123: split into library and binary packages
mpg123: move into libs folder
squeezelite: Add Makefile and patch from forum user joky

        Source: https://forum.openwrt.org/viewtopic.php?pid=245723#p245723
squeezelite: add libmad dependency
squeezelite: Use git repository as source
README: squeezelite added