Sets from Jarl: sets holding the addresses of names in Jarl

A set can take its addresses from Jarl: every A and AAAA record of its
names (NAME@VIEW), CNAMEs followed within Jarl's zones in the same view.
housecarld reads them every jarl.refresh and after each change, keeps
only the addresses within the zones and networks the set allows, and
keeps what it last read (saved in the database and the boot ruleset)
while Jarl can't be reached. A change of the addresses applies the
ruleset again without a history entry and is audited (set.jarl).

hc set add --jarl --within, hc set jarl; the kind "from Jarl" and
Addresses… on the Sets page; GET /sets/{name}/jarl and /jarl/refresh;
validation codes set_jarl_*, status warnings jarl_*; docs/jarl.md.
e2e phase with scripts/fakejarl.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/matrix/matrix.go

@@ -241,7 +241,7 @@ func verdictOf(action string) string {
 
 // elsewhere reports whether every address of refs (addresses, sets) lies
 // in networks connected to zones other than zone: then traffic of zone
-// can't have them. An empty list, a dynamic set, or an address the
+// can't have them. An empty list, a dynamic or Jarl set, or an address the
 // firewall isn't directly connected to (a routed network) might.
 func elsewhere(st *model.State, o Options, refs []string, zone string) bool {
 	if len(refs) == 0 || len(o.Connected) == 0 || zone == Firewall {
@@ -250,7 +250,7 @@ func elsewhere(st *model.State, o Options, refs []string, zone string) bool {
 	var entries []string
 	for _, r := range refs {
 		if s := st.Set(r); s != nil {
-			if s.Dynamic {
+			if s.Runtime() {
 				return false
 			}
 			entries = append(entries, s.Entries...)