Can't set interface listen port without wireguard_endpoint being defined

[semoog]

The recent changes to the config template, namely adding a condition linking ListenPort to wireguard_endpoint have broken the ability to set a port on the interface without an endpoint defined. On 17.1.0 we get a random port assigned by WG every time, because the portion of the template setting up ListenPort never gets rendered. Server interfaces don't need endpoints configured - only the client peers need to specify endpoints to know where to connect, so this condition doesn't match WireGuard's actual requirements.

Change was merged in with 17.1.0 - #101 /
https://github.com/githubixx/ansible-role-wireguard/pull/102/files

https://github.com/githubixx/ansible-role-wireguard/blob/master/templates/etc/wireguard/wg.conf.j2#L18-L20:

[Interface]
...
{% if wireguard_endpoint is defined and wireguard_endpoint != "" %}
ListenPort = {{ wireguard_port }}
{% endif %}

Note that this is on the interface, not the peer. This functionality works as expected on 17.0.0 prior to the changes above.