In spite of there being considerable documentation sometimes in the
config file, we go with CC0 because we don't want the notion of
'derived work' of a config file.
The example `settings.conf` is also CC0. Add some docs to
it while we're at it.
- For both shellprocess and contextualprocess, add a top-level key
"timeout" that defaults to 10 seconds (which it already did).
- Allows setting "global" timeout for command-lists, while still
allowing individual timeouts per-command.
- Setting timeout per global variable in contextualprocess is not
supported; that would restrict the possible space of comparisions,
while not supporting a global setting timeout seems reasonable enough.
Use instances if you need wildly variable timeouts and don't want to
set them individually.
This is basically dummyprocess, except with an expanded configuration
interface so you can run 1 or more shell commands in the live
or target system with a suitable configuration file and instance
of shellprocess in settings.conf.
It can replace downstream modules that implement their own
process modules with a command, by an instance of shellprocess.
