Every hook has a built-in default policy, but expressing anything other
than the built-in meant naming each hook explicitly.
This commit adds a `default-policy` setting that covers all hooks below it.
For any hook the most specific setting present wins.
DoParseAppSubStatePolicy() collapses into DoParseAppPolicy() as a sub state
hook only differs by an extra path segment.
Ticket: 8712
The policy config was a flat map mixing packet hooks and app-layer
protocols: `packet-filter` next to `dns`. There was no node that meant
"the packet hooks" or "the app-layer hooks", so a setting could not be
scoped to one group.
Move each group under its own node:
packet-filter -> packet.filter
packet-pre-flow -> packet.pre-flow
packet-pre-stream -> packet.pre-stream
<proto>.<hook> -> app.<proto>.<hook>
Ticket: 8712
AppProtoToString(ALPROTO_HTTP1) returns "http", so an HTTP/1 policy had to
be written as `http:` while its rule hooks were already spelled `http1:`.
Use the same name in both places.
Ticket: 8712
Add information about:
- available tables, default policies and rule ordering
- Packet layer and applayer tables and hooks
- engine analysis output
- commandline options available
- how to load firewall rules
Also, reorganize sections and content to assist the definitions.
- cleanup usage and documentation around needs
- mentiond that rule hooks are used instead of "needs" keywords with
link with rule hooks (which is still in the firewall-design doc)