Add comment about systray_fake

Author: matteosuppo

systray/systray.go

@@ -8,6 +8,7 @@ import (
 	"github.com/kardianos/osext"
 )
 
+// Systray manages the systray icon with its menu and actions. It also handles the pause/resume behaviour of the agent
 type Systray struct {
 	// Whether the Agent is in Pause mode
 	Hibernate bool

systray/systray_fake.go

@@ -1,5 +1,6 @@
 // +build cli
 
+// Systray_fake gets compiled when the tag 'cli' is present. This is useful to build an agent without trayicon functionalities
 package systray
 
 import "os"

systray/systray_real.go

@@ -1,5 +1,6 @@
 // +build !cli
 
+// Systray_real gets compiled when the tag 'cli' is missing. This is the default case
 package systray
 
 import (