[New Sniff] Check for wp-load.php

[justintadlock]

Otto brought this up in Slack (https://wordpress.slack.com/archives/themereview/p1470952005002504), but it's long been one of those things that we wouldn't allow.

Basically, themes should not be attempting to find and load the wp-load.php file. I can't think for a legit use case for themes to do this.

This is most often an issue when themes are attempting to create a dynamic stylesheet instead of utilizing the wp_add_inline_style() function.

[Pross]

Looking for wp-load or blog-header is one check maybe look for ../ too? If you use the dir functions properly you should never need it

[khacoder]

Cool, I was thinking of adding a sniff when I saw Otto made the comment.

[grappler]

Making a note that @dmtrmrv is working a sniff.

[dmtrmrv]

Yes, I am. Will publish add a PR shortly.

[dingo-d]

@dmtrmrv I know it's been a long time but are you interested in picking this up?