4.1.0

• fixed #49 where the old session_set_save_handler signature with more than 2 arguments was deprecated in PHP 8 and the deprecated signature would become unsupported either in PHP 9.0 or 10.0; the library is still backwards compatible; thanks to Joe Bordes for the heads up!
• the lock_to_ip argument of the constructor can now also be a callable; see #56; this is a better and more secure fix for #43 and #54; this is also a fix for a very old #7! thanks Andreas Heissenberger for the great idea and the feedback
• added a fix for using the library with an AWS load balancer; see #43 and #54; thank you Dvelopin!
• fixed (hopefully) #53 regarding table locks not being released if script execution ended before the library being able to write session data and release the lock
• fixed an issue where get_settings() would trigger an error if session.gc_divisor is set to 0; this fixes #48 - thanks to Alex!