feat: able to delete all manually disabled channels (close #539)

common/constants.go

@@ -156,9 +156,10 @@ const (
 )
 
 const (
-	ChannelStatusUnknown  = 0
-	ChannelStatusEnabled  = 1 // don't use 0, 0 is the default value!
-	ChannelStatusDisabled = 2 // also don't use 0
+	ChannelStatusUnknown          = 0
+	ChannelStatusEnabled          = 1 // don't use 0, 0 is the default value!
+	ChannelStatusManuallyDisabled = 2 // also don't use 0
+	ChannelStatusAutoDisabled     = 3
 )
 
 const (