TUN-5749: Refactor cloudflared to pave way for reconfigurable ingress

- Split origin into supervisor and proxy packages
- Create configManager to handle dynamic config

supervisor/conn_aware_logger.go

@@ -0,0 +1,42 @@
+package supervisor
+
+import (
+	"github.com/rs/zerolog"
+
+	"github.com/cloudflare/cloudflared/connection"
+	"github.com/cloudflare/cloudflared/tunnelstate"
+)
+
+type ConnAwareLogger struct {
+	tracker *tunnelstate.ConnTracker
+	logger  *zerolog.Logger
+}
+
+func NewConnAwareLogger(logger *zerolog.Logger, observer *connection.Observer) *ConnAwareLogger {
+	connAwareLogger := &ConnAwareLogger{
+		tracker: tunnelstate.NewConnTracker(logger),
+		logger:  logger,
+	}
+
+	observer.RegisterSink(connAwareLogger.tracker)
+
+	return connAwareLogger
+}
+
+func (c *ConnAwareLogger) ReplaceLogger(logger *zerolog.Logger) *ConnAwareLogger {
+	return &ConnAwareLogger{
+		tracker: c.tracker,
+		logger:  logger,
+	}
+}
+
+func (c *ConnAwareLogger) ConnAwareLogger() *zerolog.Event {
+	if c.tracker.CountActiveConns() == 0 {
+		return c.logger.Error()
+	}
+	return c.logger.Warn()
+}
+
+func (c *ConnAwareLogger) Logger() *zerolog.Logger {
+	return c.logger
+}