[sr-dev] [kamailio/kamailio] Misdirected packets with NAT and topos loaded (#1005)

[dryvoip]

I'm working on capturing the SIP dialog and the database queries and will try to report back later today.

Meanwhile, I have observed the following which seems to intermittently happen when hanging up on an established call:

```
-> Request: BYE sip:btpsh-58af2eee-8ef-1 at 1.2.3.180
<- Request: BYE sip:1.2.3.177:5065;lr=on
```

When this happens, the far end replies 404 and keeps the session open until it's session timer fires and the reINVITE fails.

When it works, I see this:

```
-> BYE sip:atpsh-58af2eee-8f6-2 at 1.2.3.180
<- BYE sip:250xxxxxxx at 4.5.6.224:5060
```

These two calls were placed back to back within a few minutes of each other, NO changes to configuration (topos loaded for both).

I can provide the full SIP dialog for these examples if you'd like but I don't have the database entries for them.

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