conf: rename attachment toggle from ENABLE to ENABLED (#4474)

conf/app.ini

@@ -297,7 +297,7 @@ ENABLE_FEDERATED_AVATAR = true
 ; Attachment settings for issues
 [attachment]
 ; Whether attachments are enabled. Defaults to `true`
-ENABLE = true
+ENABLED = true
 ; Path for attachments. Defaults to `data/attachments`
 PATH = data/attachments
 ; One or more allowed types, e.g. image/jpeg|image/png

pkg/setting/setting.go

@@ -515,7 +515,7 @@ func NewContext() {
 	AttachmentAllowedTypes = strings.Replace(sec.Key("ALLOWED_TYPES").MustString("image/jpeg,image/png"), "|", ",", -1)
 	AttachmentMaxSize = sec.Key("MAX_SIZE").MustInt64(4)
 	AttachmentMaxFiles = sec.Key("MAX_FILES").MustInt(5)
-	AttachmentEnabled = sec.Key("ENABLE").MustBool(true)
+	AttachmentEnabled = sec.Key("ENABLED").MustBool(true)
 
 	TimeFormat = map[string]string{
 		"ANSIC":       time.ANSIC,