reconnect: improve error message is reconnect is disabled

if reconnect is disabled then a failure in iscsi_service_reconnect_if_loggedin
can leak back to the application by iscsi_service returning an error
but the error string is not being updated.
Thus the applucation will print the last prevous error message that was set.

Change iscsi_service_reconnect_if_loggedin to print a less confusing
error message.

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>

lib/socket.c

@@ -785,6 +785,8 @@ iscsi_service_reconnect_if_loggedin(struct iscsi_context *iscsi)
 		}
 		return 0;
 	}
+	iscsi_set_error(iscsi, "iscsi_service_reconnect_if_loggedin. Can not "
+			"reconnect right now.\n");
 	return -1;
 }