This reverts the fix for bug #24557.
- Make php_stream_free delete the stream from the resources list, not merely
decrease its refcount, as a single call to zend_list_delete does.
#Not worth the risk merging to 5.3. While change #2 may prevent some segfaults,
#a quick and dirty survey to the codebase only showed calls to php_stream_close
#or php_stream_free on streams allocated in the same function, which would have
#refcount == 1. May be reconsidered.
