song: clarified song_get_uri() API documentation
song: clarified song_get_uri() API documentation

sl0th/libmpdclient,jwise/libmpdclient,OpenInkpot-archive/iplinux-libmpdclient,jagleeso/libmpdclient,sl0th/libmpdclient,cmende/libmpdclient,yusiwen/libmpdclient,jwise/libmpdclient,jwise/libmpdclient,psych0tik/libmpdclient2,cmende/libmpdclient,psych0tik/libmpdclient2,jagleeso/libmpdclient,cmende/libmpdclient,jagleeso/libmpdclient,OpenInkpot-archive/iplinux-libmpdclient,sl0th/libmpdclient,yusiwen/libmpdclient,yusiwen/libmpdclient