[Pawn] y_hooks v4(ish)

[ohmios]

The major problem with new keywords is compatibility - making sure they don't break existing code which ma already use them as function or variable names.

Do what C does with new keywords, the actual new keyword for "foo"?is?_Foo, and to use "foo" as "foo" you have to include foo.h

That said, code using "continue" or "break"?as function or variable names?deserve to be broken.