[PATCH] Better handling for deprecated functions (implements #66861)

Hello,

some of you probably remember this feature request 
https://bugs.php.net/bug.php?id=66861 I created working, but 
not-so-well-tested implementation of this mockup: 
http://i.imgur.com/EH1d9ew.png

Pull requests are ready for review (they are complementary), all details 
inside:
- https://github.com/php/web-php/pull/63
- https://github.com/php/phd/pull/12

I would be very glad for code review and testing in at least one more 
environment.

Have a good day,
Maciej.

PS: Hannes, Adam and Yasuo, I've CC'ed you because of your interest in 
this feature.