[FS#826] Better implementation of upgrade system on lede

[LEDE Bugs]

The following task has a new comment added:

FS#826 - Better implementation of upgrade system on lede
User who did this - aparcar (aparcar)

----------
The checksum check is planned, thanks for the reminder!
----------

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=826#comment3847