Revision 212235
libedit: Try to map <Delete> to ed-delete-next-char.

This adds a new "arrow" key "delete" corresponding to the kD termcap 
value. It only works if that is a sequence such as "\033[3~"; if it is 
"\177", the em-delete-prev-char or ed-delete-prev-char from the 
single-character mappings remains. It turns out that most terminals (xterm 
and alikes, syscons in xterm mode) produce "\033[3~" by default so 
<Delete> has the expected effect.

This also means that things need to be considerably misconfigured for
<Backspace> to perform a <Delete> action.

--- term.c	2007/06/10 19:06:09	170511
+++ term.c	2010/09/05 16:12:10	212235
@@ -223,7 +223,9 @@
 	{ "kh", "send cursor home" },
 #define	T_at7	37
 	{ "@7", "send cursor end" },
-#define	T_str	38
+#define	T_kD	38
+	{ "kD", "send cursor delete" },
+#define	T_str	39
 	{ NULL, NULL }
 };
 
@@ -1062,6 +1064,11 @@
 	arrow[A_K_EN].key = T_at7;
 	arrow[A_K_EN].fun.cmd = ED_MOVE_TO_END;
 	arrow[A_K_EN].type = XK_CMD;
+
+	arrow[A_K_DE].name = "delete";
+	arrow[A_K_DE].key = T_kD;
+	arrow[A_K_DE].fun.cmd = ED_DELETE_NEXT_CHAR;
+	arrow[A_K_DE].type = XK_CMD;
 }
 
 
--- term.h	2007/06/10 19:06:09	170511
+++ term.h	2010/09/05 16:12:10	212235
@@ -79,7 +79,8 @@
 #define	A_K_RT		3
 #define	A_K_HO		4
 #define	A_K_EN		5
-#define	A_K_NKEYS	6
+#define	A_K_DE		6
+#define	A_K_NKEYS	7
 
 protected void	term_move_to_line(EditLine *, int);
 protected void	term_move_to_char(EditLine *, int);