[FIX] requirements: also add the requirement for pysftp
[FIX] requirements: also add the requirement for pysftp

By default it now installs pysftp 0.2.9, which still causes nasty errors in openssl.
Very similar to https://stackoverflow.com/questions/43267157/python-attributeerror-module-object-has-no-attribute-ssl-st-init
Yenthe666/auto_backup,Yenthe666/auto_backup