L2TP connections fail to reconnect after a initial connection failure via a Parent Interface.

[Ttfgggf]

Important notices

Before you add a new report, we ask you kindly to acknowledge the following:

• I have read the contributing guide lines at https://github.com/opnsense/core/blob/master/CONTRIBUTING.md
• I am convinced that my issue is new after having checked both open and closed issues at https://github.com/opnsense/core/issues?q=is%3Aissue

Describe the bug

L2TP fails to reconnect when dependent on another interface (in this case a WAN) when it originally goes down.
Even if they are IPv4 and IPv6 gateways set up for L2TP (marked as Upstream and 1 and 2 respectively).

This has happened across many reboots now.

Also the lack of the ability to use a domain name in the gateway field when setting up a L2TP connection (The IP address associated with my L2TP connection may change that is why I ask this)

To Reproduce

Set up a L2TP connection with a username and password.
Define the gateway.
Save the connection.
Leave the L2TP connection going for a few hours and then reboot.
Find that the connection may or may not come back up.

Expected behavior

L2TP Connection reattempts connection via parent interface after a failure and doesn't just stop.
Also full support of the use of a domain name for a gateway, not just an IP address.

Describe alternatives you considered

Originally, I was running opnSENSE virtually and thought maybe the hypervisor had an issue that was causing the L2TP disconnects.
I moved to physical hardware and the same thing happened.

Screenshots

Not available at the moment.
Due to another issue, I have faced with opnsense (self-caused) not related to this issue.

Relevant log files

Not available at the moment.
Due to another issue, I have faced with opnsense (self-caused) not related to this issue.

Additional context

Not available at the moment.
Due to another issue, I have faced with opnsense (self-caused) not related to this issue.

Environment

Software version used and hardware type if relevant, e.g.:

OPNsense 23.7.8 (amd64).
Intel i5-9500 Processer
16GB Ram
Dell Optiplex 3070