[php-src] Issue #10885: Memory allocated by stream_context_create not released

Issue: https://github.com/php/php-src/issues/10885 Author: lucasnetau ### Description I have a long running PHP application that is creating stream_socket_server over time, the memory allocated by stream_context_create() is never released even after closing and destroying the stream_socket_server. A minimal reproduction is below (backlog is set to allocate more memory on each loop however even an empty array to stream_context_create shows this issue). Eventually the application will crash, this is more evident in memory constrained environments like container deployments. I found an old PHP bugs report referencing this with stream_socket_client (https://bugs.php.net/bug.php?id=61371) `inhibition for deleting the context was too broad` and a really old one that says that stream_context_create() memory is never released https://bugs.php.net/bug.php?id=40257 but this is not documented. Output from memprof shows the allocated memory from stream_context_create() <img width="487" alt="image" src="https://user-images.githubusercontent.com/9331242/226255347-0a3b4ac6-f2c5-49b7-a52f-ba76285ae523.png"> ```php <?php $m0 = memory_get_usage(true); for ($i=0;$i<50000;++$i){ $context = stream_context_create(['socket'=>['backlog'=>511]]); $server = @\stream_socket_server( 'tcp://127.0.0.1:0', $errno, $errstr, \STREAM_SERVER_BIND | \STREAM_SERVER_LISTEN, $context, ); fclose($server); unset($server); unset($context); unset($errno); unset($errstr); } $m1 = memory_get_usage(true); echo ($m1-$m0)/1048576,' MB allocated',PHP_EOL; $cycles = \gc_collect_cycles() + gc_collect_cycles(); echo 'Ran ', $cycles, ' GC Cycles', PHP_EOL; ``` Resulted in this output: ``` 46.00390625 MB allocated Ran 0 GC Cycles ``` But I expected this output instead: ``` 0 MB allocated Ran 0 GC Cycles ``` ### PHP Version PHP 8.0.28 - PHP 8.2.4 ### Operating System _No response_