cmd/cli: use warn level for network changes logging

So these events will be recorded separately from normal runtime log,
making troubleshooting later more easily.

While at it, only update ctrld.ProxyLogger for runCmd, it's the only one
which needs to log the query when proxying requests.

cmd/cli/main.go

@@ -143,8 +143,6 @@ func initLoggingWithBackup(doBackup bool) []io.Writer {
 	multi := zerolog.MultiLevelWriter(writers...)
 	l := mainLog.Load().Output(multi).With().Logger()
 	mainLog.Store(&l)
-	// TODO: find a better way.
-	ctrld.ProxyLogger.Store(&l)
 
 	zerolog.SetGlobalLevel(zerolog.NoticeLevel)
 	logLevel := cfg.Service.LogLevel