Small but important tweaks to fix the operation of the nut initscripts
and hotplug scripts.  All hail shellcheck and proofreading and
dogfooding.

Signed-off-by: Daniel F. Dickinson <cshored@thecshore.com>

Signed-off-by: Daniel F. Dickinson <cshored@thecshore.com>

Avoid potential issues with space or other strangeness by
quoting filenames through the initscripts.

Signed-off-by: Daniel F. Dickinson <cshored@thecshore.com>

Even though nut-cgi doesn't run a daemon, using procd triggers
is helpful for updating the generated config file when the
UCI config changes.  So implement this and 'modernize' nut-cgi initscript

Signed-off-by: Daniel F. Dickinson <cshored@thecshore.com>

This allows config for setting variables and/or running
commands from the CGI.

Signed-off-by: Daniel F. Dickinson <cshored@thecshore.com>

With a LuCI app (of which I have one written) ucification makes
sense (and is in fact needed), so ucify the initscripts.

Also, rather than making selection of things to include an image
a matter of selecting compile-time config options, make optional
things into seperate packages that are built in default builds,
and leave selection of what to include or not up to the user
(e.g. using ImageBuilder, or adding packages via opkg).

Signed-off-by: Daniel Dickinson <lede@cshore.thecshore.com>