- Add autoconfig XML endpoint on autoconfig.lassul.us via nginx
- Add DNS SRV records for IMAPS and SMTP submission (RFC 6186)
- Fix vmail tmpfiles rules to use 2770 to match dovecot pre-start

mutt:
- Fix notmuch folder queries to use Maildir++ dot prefix
- INBOX opens by default via explicit notmuch spoolfile
- Unread shows all unread across all folders
- Archive (A) tags messages, hidden from INBOX on sync
- Show mailbox counts in sidebar at startup
- Set mbox_type=Maildir, auto-confirm append/create/delete

muchsync:
- Move archived messages from INBOX to archive folder before sync

Enable mail_check_stats so sidebar shows counts without opening
each mailbox first. Change archive (A) to move messages to an
archive folder on disk instead of just tagging.

notmuch indexes Maildir++ folders with the dot prefix, so queries
need folder:.to.steam not folder:to.steam. INBOX is the root
maildir, queried as folder:"".