• [added] Added service restrictions to systemd
• [changed] Rust version 1.40.0
• [changed] Also drop privileges in foreground mode
• [changed] Set builders to Ubuntu 16.04 and CentOS 7
• [changed] Set keepalive to 120 secs when NAT is detected
• [changed] Deleting beacon file at shutdown
• [changed] Updated dependencies
• [fixed] Added parameter keepalive to manpage
• [fixed] Fixed problems on stats file when dropping permissions
• [fixed] Deleting files before overwriting them
• [fixed] Fixed duplicate port bindings