Data base format.

- All information is in the form of text records with attributes
described below.

- Information is collected by dumb data collection tools: no smarts,
just do what you're told to do.

- Inferences and conclusions are in the same format.

Attributes.

1 - target. Name of host that the record refers to. Preferences:
FQDN, IP estimated, partial.

2 - service: basename of tool (suffix stripped off).

3 - status. Examples: (a,u,b,x) available, unavailable (e.g. timeout),
bad (e.g. unable to resolve), x (usually means we have some new thing
to look into, like a new hostname).  Not quite the same as certainty.

4 - severity: rs: host (=root), us: user shell, ns, nobody shell, uw
user file write, nr: nobody file read, etc.,

5 - trust: root@host == @host; left part is: user nobody root ANY; right
part us target or ANY.

6 - canonical service output: (user name, home dir, last login) or
(filesys, clients)

7 - text (last): just plain text.
