Revert and cleanup Lisp_Cons, Lisp_Misc and Lisp_Symbol things.

* src/lisp.h (struct Lisp_Symbol): Change xname to meaningful
name since all xname users are fixed long time ago.  Do not use
INTERNAL_FIELD.
(set_symbol_name, set_symbol_function, set_symbol_plist):
(set_symbol_next, set_overlay_plist): New function.
(struct Lisp_Cons): Do not use INTERNAL_FIELD.
(struct Lisp_Overlay): Likewise.
(CVAR, MVAR, SVAR): Remove.
* src/alloc.c, src/buffer.c, src/buffer.h, src/bytecode.c:
* src/cmds.c, src/data.c, src/doc.c, src/eval.c, src/fns.c:
* src/keyboard.c, src/lread.c, src/nsselect.m, src/xterm.c:
Adjust users.
* src/.gdbinit: Change to use name field of struct Lisp_Symbol
where appropriate.
* admin/coccinelle/overlay.cocci, admin/coccinelle/symbol.cocci:
Remove.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/buffer.h b/src/buffer.h
index 54e7ef288ed..9618fc6ded1 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -991,15 +991,15 @@ BUF_FETCH_MULTIBYTE_CHAR (struct buffer *buf, ptrdiff_t pos)
 
 /* Return the marker that stands for where OV starts in the buffer.  */
 
-#define OVERLAY_START(OV) MVAR (XOVERLAY (OV), start)
+#define OVERLAY_START(OV) XOVERLAY (OV)->start
 
 /* Return the marker that stands for where OV ends in the buffer.  */
 
-#define OVERLAY_END(OV) MVAR (XOVERLAY (OV), end)
+#define OVERLAY_END(OV) XOVERLAY (OV)->end
 
 /* Return the plist of overlay OV.  */
 
-#define OVERLAY_PLIST(OV) MVAR (XOVERLAY (OV), plist)
+#define OVERLAY_PLIST(OV) XOVERLAY (OV)->plist
 
 /* Return the actual buffer position for the marker P.
    We assume you know which buffer it's pointing into.  */