(USE_MMAP_FOR_BUFFERS): Define instead of REL_ALLOC_MMAP.

src/s/freebsd.h

@@ -190,7 +190,7 @@
 
 #define GC_MARK_STACK 	1
 
-/* Define REL_ALLOC_MMAP to use an ralloc implementation based on
-   mmap(2)  */
+/* Define USE_MMAP_FOR_BUFFERS to let Emacs use mmap(2) to allocate
+   buffer text.  This overrides REL_ALLOC.  */
 
-#define REL_ALLOC_MMAP	1
+#define USE_MMAP_FOR_BUFFERS	1

src/s/irix5-0.h

@@ -123,4 +123,4 @@ char *_getpty();
 
 #define NARROWPROTO 1
 
-#define REL_ALLOC_MMAP 1
+#define USE_MMAP_FOR_BUFFERS 1

src/s/sol2.h

@@ -47,4 +47,4 @@
 #define LIBS_TERMCAP -ltermcap
 #endif
 
-#define REL_ALLOC_MMAP 1
+#define USE_MMAP_FOR_BUFFERS 1

src/s/template.h

@@ -147,8 +147,8 @@ Boston, MA 02111-1307, USA.  */
    is not ':', #define this to be the appropriate character constant.  */
 /* #define SEPCHAR ':' */
 
-/* Define this if the system can use mmap in ralloc.c.  */
-/* #define REL_ALLOC_MMAP 1 */
+/* Define this if the system can use mmap for buffer text allocation.  */
+/* #define USE_MMAP_FOR_BUFFERS 1 */
 
 /* ============================================================ */