deviceInfo: Moving networking, storage, and provider details to device status
New feature: timestamped subdirs

- with TIMESTAMPED_SUBDIRS=1, create a separate subdir each run
- as the name suggests: subdir-name is the timestamp of the run (YYYYMMDDHHMI)
- optionally, keep a link pointing to the latest subdir with LINK_LATEST_SUBDIR=1
LINK_LATEST: checking whether there's no other file/dir in the way
New config keyword KEEP_SUBDIR_GENERATIONS to auto-purge timestamped subdirs