Use AUTO_CONS instead of SCOPED_CONS, etc.

Use AUTO_CONS instead of SCOPED_CONS, etc.

* doc/lispref/internals.texi (Stack-allocated Objects):
Adjust to match the revised, less error-prone macros.
* src/frame.h (AUTO_FRAME_ARG): Rename from FRAME_PARAMETER.
* src/lisp.h (AUTO_CONS): Rename from scoped_cons.
(AUTO_LIST1): Rename from scoped_list1.
(AUTO_LIST2): Rename from scoped_list2.
(AUTO_LIST3): Rename from scoped_list3.
(AUTO_LIST4): Rename from scoped_list4.
(AUTO_STRING): Rename from SCOPED_STRING.
* src/frame.h (AUTO_FRAME_ARG):
* src/lisp.h (AUTO_CONS, AUTO_LIST1, AUTO_LIST2, AUTO_LIST3)
(AUTO_LIST4, AUTO_STRING):
Prepend a new argument 'name'.
Declare a variable instead of yielding a value.
All uses changed.
* src/lisp.h (STACK_CONS, AUTO_CONS_EXPR): New internal macros.