* lang_php/parsing/ast_php.ml: comments
* lang_c/analyze/ast_c_simple.ml:
pfff: refactoring for ident/names in ast_php.ml

Summary:
I just include in this diff the modification to ast_php.ml.
I had to fix a tons of files to make this work.

Test Plan: make

Reviewers: pieter

Differential Revision: https://phabricator.fb.com/D827543
CEs on ident/name refactoring, huge