Provide better feedback or retry when incorrect type (TAP/TUN) (L2/L3) is used

[Lyamc]

** Describe the high-level goal you want to achieve **

When Peer A is running with TAP and Peer B attempts to connect to Peer A, Peer B will get ERROR - Parse error: Invalid IP protocol version instead of either helping point me to the problem, or, just trying something else to make it work.

** Here's a few possible solutions **

1: Provide a clearer or more helpful message like:
ERROR - Parse error: Invalid IP protocol version. Check that the specified type (TUN/TAP) is correct.

2: Add an prompt to test a connection with the config tool to verify that things are correct

3: Add a retry TAP/TUN upon initial connection failure, and display WARN in the logs to indicate that something isn't quite right.

[dswd]

Thanks for pointing out. I will add a hint to the error message and maybe some logic to identify the misconfiguration.