Remove server from list if unresponsive (down)

[longlostnick]

this is a way to keep the server list up to par if a server disconnects without being shutdown gracefully.

We should have some way for a server to go through the list ever x minutes and ping each server in the list. If a server has disconnected, remove it from the list.

testConnection in Server should work for pinging, we just might have to set up a new thread class to continuously keep pinging the servers every so often.

This should hopefully help to mitigate the amount of bad servers in a client's list.

EDIT: Instead I think we should just automatically remove it from the list if we ever can't reach it. For example, if we are trying to send out a client's message to propagate on a server and it's not there, we should just remove that server from the list. Title changed appropriately.