reoftpd v0.1.0

Hardened append-only FTPS archive server for Reolink cameras.
- Append-only uploads (byte-level non-overlap, stage-then-finalize immutability)
- Scoped read-only viewer accounts; argon2id auth; opportunistic FTPS + per-account require_tls
- Concurrent-session caps (global + per-account) + nftables generator for per-IP
- SIGHUP live config reload
- Optional age (X25519) encryption at rest, on-the-fly, multi-recipient
- 30-day retention; hardened systemd units; Linux+FreeBSD; AGPL-3.0