lftp: Add mirrors and check in old/ subdir (for old releases)
lftp: Add mirrors and check in old/ subdir (for old releases)

(cherry picked from commit 8cccc9da9c7bcc8342a2918c2d3e8a125c21ca00)

jacobbarsoe/rpi-base,oe-lite-rpi/base,jacobbarsoe/rpi-base,oe-lite-rpi/base