Bug with lmtp_save_to_detail_mailbox

lmtp_save_to_detail_mailbox = yes

Plus-delivery conflicts with existing, reserved files such as "subscriptions": Message for kim+subscriptions@ results in: lmtp(kim@***.com)<14493><SK7sEvaHEWSdOAAAvAYmHA>: Error: ....stat(/var/mails/***/kim/Maildir/subscriptions/tmp) failed: Not a directory Version: 2.3.18