Config file completely wiped on lldpad daemon stop/restart/SIGHUP

Hi all,

I'm currently running lldpad v1.1.1-3:
```
# rpm -qi lldpad
Name : lldpad
Version : 1.1.1
Release : 3.gitf1dd9eb.el9
Architecture: x86_64
Install Date: Thu 14 Nov 2024 02:56:41 PM CET
Group : Unspecified
Size : 713305
License : GPL-2.0-only
Signature : RSA/SHA256, Wed 09 Oct 2024 09:16:02 AM CEST, Key ID 05b555b38483c65d
Source RPM : lldpad-1.1.1-3.gitf1dd9eb.el9.src.rpm
Build Date : Tue 10 Sep 2024 09:51:44 AM CEST
Build Host : x86-01.stream.rdu2.redhat.com
Packager : builder@centos.org
Vendor : CentOS
URL : https://github.com/intel/openlldp
Summary : Intel LLDP Agent
```

This is started up on boot by systemd, and it creates a config file in /var/lib/lldpad/lldpad.conf

After some configurations issued by lldptool, the lldpad.conf file looks complete:

```
# cat /root/lldpad.conf

lldp :
{
eno1 :
{
tlvid00000001 :
{
info = "0420040FEBE37C";
};
tlvid00000002 :
{
info = "05656E6F31";
subtype = 5;
};
adminStatus = 3;
tlvid00000005 :
{
enableTx = true;
};
tlvid00000004 :
{
enableTx = true;
};
};

#
```

Unfortunately, when I shut down, restart or even reload (SIGHUP) the lldpad daemon, it decides to kill all the content of the config file:

```
# cat /root/lldpad.conf
dcbx :
{
version = "1.0";
dcbx_version = 2;
};
nearest_customer_bridge :
{
};
nearest_nontpmr_bridge :
{
};
lldp :
{
};
#
```

Loading the daemon in debug mode, I can clearly see that it kills every port from the config file:

```

14:49:48.040432 In remove_port: Found port eno2
14:49:48.040442 In remove_port: Found port eno2
14:49:48.046431 In remove_config_device, remove eno2 from section nearest_customer_bridge
14:49:48.046546 In remove_config_device, remove eno2 from section nearest_nontpmr_bridge
14:49:48.046664 In remove_config_device, remove eno2 from section lldp

```

In my humble opinion, this seems due to the:

[https://github.com/intel/openlldp/commit/a75e35a0cb36817e42a69ac14d1785cc63341132
](https://github.com/intel/openlldp/commit/a75e35a0cb36817e42a69ac14d1785cc63341132)

Could you please give a look and let me know?