[php-src] Issue #8159: Apache / PHP segfaults (PHP 8.0 and 8.1, but also 7.4)

Issue: https://github.com/php/php-src/issues/8159 Comment Author: dstogov @unix-world The best backtrace shows crash under start_accel_module(), but this function just forwards to zend_startup_module(), that is not in backtrace. Try to attach GDB/LLDB to the main Apache process, set breakpoint on start_accel_module() and then try to understand what is going wrong after restart. It's also possible to add some instrumentation code into start_accel_module() to write address of `zend_startup_module and accel_module_entry` into Apache error log.