json files of api exchange: 'upload/_123123123-userman_TEST.json'

old: upload/_123123123-userman.TEST

Signed-off-by: Oleg Verych <olecom@gmail.com>
rm lftpd.sh: thank you `/bin/sh ./etc/lftpd.sh`, hi `/bin/lftp -e echo`

Move setting up `lftp` into node.js. Shell has done its development role.

* move setup logic in front of the rest
* on_lftp_close: fix sts concat

Signed-off-by: Oleg Verych <olecom@gmail.com>