load php.ini at startup

[nvms]

zphp now reads a php.ini file: --ini=PATH, then the ZPHP_INI environment variable, then php.ini in the working directory. -d name=value overrides a directive from the command line the way php -d does. Values follow the php.ini rules for quotes, On/Off, ${VAR} expansion, and E_* expressions such as E_ALL & ~E_DEPRECATED.

The file is read once into a process-lifetime list and applied at the start of every request beneath the ini_set layer, so a request under zphp serve never inherits another request's ini_set or date_default_timezone_set. date.timezone, error_reporting, and max_execution_time take effect in the VM, ini_restore returns to the file's value, and php_ini_loaded_file reports what was read. extension= lines load extensions through the same loader as --extension, by path or by name inside extension_dir.

tests/ini_test covers the three discovery paths, -d, value cooking, the live mirrors, request isolation under serve, and both extension= forms; it runs in the extensions CI job.