Document idb naming for ret-sync in IDA

[saidelike]

We should document in tutorial.md how to have ret-sync working. Something along the lines:

---

The module request has no match in IDA because IDA can’t find any module with the right name gdb is aware of. To work around that, you need to rename your idb in the ret-sync window. By default, it is named “lina” as “[sync] default idb name: lina” points out but on the gdb side it is expecting “asa924-k8.bin|lina” to be the idb name.

You can either rename it manually in the ret-sync window in IDA or just create a “.sync” file in the same folder as “lina” and it will name it for you automatically:

[INTERFACE]
host=192.168.1.100
port=9100

[lina]
name=asa924-k8.bin|lina