UCS / Raid / Zone Fixes (#1033)

* Cache EntityList::GetRaidByClient

* Adjustments [skip ci]

* Update entity [skip ci]

* More cleanup [skip ci]

* More tweaks [skip ci]

* Cleanup [skip ci]

* Fix bugs with UCS reconnection on crash / exit, not adding soft deleted characters, put main loop on UV lib

* Reduce log spam that should be debugging; send keepalives to clients so that they properly prune from the connection list

* Shutdown the eventloop to properly shutdown the zone versus calling a hard exit

zone/client.cpp

@@ -256,6 +256,7 @@ Client::Client(EQStreamInterface* ieqs)
 	TotalSecondsPlayed = 0;
 	keyring.clear();
 	bind_sight_target = nullptr;
+	p_raid_instance = nullptr;
 	mercid = 0;
 	mercSlot = 0;
 	InitializeMercInfo();