Add the tier 3 utility IRC commands (closes #87)

USERHOST, VERSION, ADMIN, INFO, TIME, KILL and WALLOPS work on the
HTTP API and on the IRC listener. The USERHOST reply, the VERSION and
INFO text, KILL and WALLOPS are each one service function that both
transports call. User mode +w selects who receives WALLOPS. MODE on
your own nick queries or changes your user modes through one parser
on both transports: the whole mode string is checked before anything
is stored, and both flags are stored in one transaction. KILL closes
the victim's IRC connection after sending it KILL and ERROR. The
sessions table gains is_wallops in 001_initial.sql, as the pre-1.0
rule in REPO_POLICIES.md asks.

Model: opus-5-5

internal/handlers/api_test.go

@@ -293,6 +293,7 @@ func newTestHandlers(
 		Config:   cfg,
 		Database: database,
 		Broker:   brk,
+		Globals:  globs,
 	})
 
 	hdlr, err := handlers.New(lifecycle, handlers.Params{ //nolint:exhaustruct