Convert ext/standard/url to HNI

I wasn't sure what to name this extension, given that HHVM has split standard up into its parts.

Most of the bad tests started passing when switched to ZendParamMode, one required a change to the warning message and accepting 64 bit integers, and the other needed an update zend-url. The deleted test is from the importing not importing it anymore given the SKIPIF checking for 32bit.

The only failing test is now due to the ordering of get_defined_constants() being different from the order they're registered. I haven't looked into it, but will be opening a ticket about it once I have a small repo case.

Part of #1480