Cummins BLF ECFG files — 2 versions for ISD4.0, CM2620 / CM2670 tuning definitions

Every Cummins BLF ECFG we hold: 2 software versions from 42.61.20.42 to 43.50.20.32 on CM2620 / CM2670 — ISD4.0, Heavy duty on-highway. Each version has its own page with the full header (module, build ID, interface level, boot loader range, parameter count).