If a user wants to bind to a privileged port (<1024) our current systemd unit fails to provide enough capabilities to endlessh binary.
So, a user can modify `/etc/endlessh/config` to have `Port=22` or similar and then check out the systemd unit to enable the extra attribute.
`ConfigurationDirectory=endlessh` should be enough. Previous assignment throws a warning with systemd 237
```
May 13 08:57:18 kernelwtf systemd[1]: Started Endlessh SSH Tarpit.
May 13 08:58:20 kernelwtf systemd[1]: /etc/systemd/system/endlessh.service:25: ConfigurationDirectory= path is not valid, ignoring assignment: /etc/endlessh
```
Thanks for creating this wonderful tool!
By default `make install` installs the binary into `/usr/local/bin` so I think this should be changed accordingly.
Cheers
As *BSD defaults to use IPv6 only sockets and Linux to IPv4 mapped IPv6
sockets, switches to support explicit binding address families are required.
Now set explicitly if you want IPv6 only, IPv4 only or mapped IPv4.
Caveat:
OpenBSD explicitly states to not support IPv4 mapped IPv6 via setsock-API
Assuming an /opt/ install. For those unfamiliar, plop it into /etc/systemd/system (symlinks might not work, old systemd bug), run `systemctl daemon-reload`, and have it start on boot (and immediately) with `systemctl enable --now endlessh.service`
