Use a different voice close code for session invalidation

[MinnDevelopment]

Description

When the main gateway connection is interrupted and the session gets invalidated, the voice gateway closes with code 4014. Instead I would prefer to have a different more specific code for my reconnect logic.

Why This is Needed

Since this code is often used as a sign to not attempt a reconnect, this becomes a problem when trying to reconnect voice connections after a full session reconnect. Usually, when I receive a 4014 close I will simply close the socket and not attempt to reconnect it. However, if the reason for closing is due to main GW, I would want to reconnect it once a new session has been established.

Alternatives Considered

Keep track of all the possible reasons for closing the socket and try to figure it out. Very complicated due to voice kick and eventual consistency.

Additional Details