PHP 7!

After running HHVM with a PHP 5.6 fallback for about six months, I switched over to PHP 7. Initially, left HHVM on as a fallback to PHP (ha), but after a week, Nginx never attempted to use HHVM.

Checking the average memory consumption, on an average day, never-used HHVM was using more memory than serving-everything PHP 7, so I removed HHVM.

A handful of plugins on the site threw some notices, mainly due PHP 7 deprecating the PHP 4 method of constructing a class. Otherwise, smooth sailing.