Raise SSH_MAX_CLIENT_COUNT sanity check limit

psiphon/server/tunnelServer.go

@@ -77,7 +77,7 @@ const (
 	PRE_HANDSHAKE_RANDOM_STREAM_MAX_COUNT = 1
 	RANDOM_STREAM_MAX_BYTES               = 10485760
 	ALERT_REQUEST_QUEUE_BUFFER_SIZE       = 16
-	SSH_MAX_CLIENT_COUNT                  = 100000
+	SSH_MAX_CLIENT_COUNT                  = 500000
 	SSH_CLIENT_MAX_DSL_REQUEST_COUNT      = 32
 )