There's a new behavior change with $_SERVER on master branch only, that's
broken MediaWiki and should break some other applications.
When variables_order=GPCS(default), $_SERVER is only populated with
PHP_SELF, REQUEST_TIME_FLOAT and REQUEST_TIME (PATH_TRANSLATED, etc... are
Is this an intentional change that we want?
If variables_order is set to EGPCS then $_SERVER is populated as normal.
I have filed a bug #75982 on this issue: https://bugs.php.net/bug.php?