Add ability to clean broken connections for getter

`GetActiveConnections()` by default returns all connections currently
recorded in `ConnectionService`, which might include broken player
connections, if player disconnected recently and it still was not
properly handled.

Optional parameter was added to clean connections before returning them,
which might cause a change in state of `ConnectionService`.

sources/Services/Connection/ConnectionService.uc

@@ -146,8 +146,12 @@ public final function bool RegisterConnection(PlayerController player)
     return true;
 }
 
-public final function array<Connection> GetActiveConnections()
+public final function array<Connection> GetActiveConnections(
+    optional bool removeBroken)
 {
+    if (removeBroken) {
+        RemoveBrokenConnections();
+    }
     return activeConnections;
 }