aria2c
To use aria2 instead of curl as default download manager, just replace the DOWNLOAD function like this in config.h:
/* DOWNLOAD(URI, referer) */
#define DOWNLOAD(d, r) { \
.v = (char *[]){ "/bin/sh", "-c", \
"cd ~/Telechargements;"\
"st -e /bin/sh -c \"aria2c -U '$1'" \
" --referer '$2' --load-cookies $3 --save-cookies $3 '$0';" \
" sleep 3;\"", \
d, useragent, r, cookiefile, NULL \
} \
}