Fix VayDNS download: use upstream release URL directly

Fix duplicate VayDNS section in README

Release v1.4.0: VayDNS tunnels, --monitor, --diag

Fix VayDNS audit issues: add-domain tunnels, SSH user URLs, diag numbering

Add VayDNS tunnel support (optimized dnstt fork)

Add --diag command for tunnel diagnostics

Add --monitor command for tunnel usage monitoring

Fix sshtun-user hangs in SSH user management menu

Fix empty slipnet URLs in --status by reading domain from config.json

Fix --status hang: add timeouts to all dnstm subcommands

Merge pull request #29 from roozbeh-gholami/master

fix: support account-scoped Cloudflare API tokens (cfat_*)

Add x-ui binary query for panel port detection

Auto-fix sshd localhost reachability for SSH tunnels

Fix share URLs, SSH credential persistence, and DNS resolution