* Partially resolve#338: Configfs network setup was broken
* Ignore shellcheck warning
...because if we do what shellcheck recommends here, we end up with
exactly the code which we're reverting in this PR.
* Automatically compute the minimum size for the partitions
* Automatically resize the pmOS_root partition during the boot process
* Resize root partition only if there is unallocated space at the end of the device.
* Added more echos to make debugging easier while looking at the pmOS_init.log.
* Updated static_code_analysis.sh script to run shellcheck with `-x` option.
