added max upload slots limit
added max upload slots limit

hamedramzi/libtorrent,TeoTwawki/libtorrent,snowyu/libtorrent,hamedramzi/libtorrent,snowyu/libtorrent,hamedramzi/libtorrent,TeoTwawki/libtorrent,TeoTwawki/libtorrent,hamedramzi/libtorrent,snowyu/libtorrent,snowyu/libtorrent,TeoTwawki/libtorrent,TeoTwawki/libtorrent,snowyu/libtorrent,snowyu/libtorrent,hamedramzi/libtorrent,TeoTwawki/libtorrent,hamedramzi/libtorrent