hostname and domainname for BGP peers

[SwimGeek]

Description

I'd like to configure the hostname and domainname sent to BGP peers.

Please see discussion: https://github.com/FRRouting/frr/discussions/16903

It seems that FRR needs to be able to use the output of: dnsdomainname

Version

FRR v10.1.1

How to reproduce

Try to configure domainname in FRR.

Expected behavior

FRR needs to inherit the value of the command dnsdomainname and be able to add it to frr.conf.

Actual behavior

I can't configure domainname in frr.

Additional context

No response

Checklist

• [X] I have searched the open issues for this bug.
• [X] I have not included sensitive information in this report.