fix insert key, terminfo and changed TERM back to st. (thx Ondrej Martinek)

config.def.h

@@ -1,5 +1,5 @@
 #define TAB 8
-#define TNAME "xterm"
+#define TNAME "st-256color"
 #define FONT "-*-*-medium-r-*-*-*-120-75-75-*-60-*-*"
 #define BOLDFONT "-*-*-bold-r-*-*-*-120-75-75-*-60-*-*"
 #define BORDER 2
@@ -34,6 +34,7 @@ static const char *colorname[] = {
 /* Special keys */
 static Key key[] = {
 	{ XK_BackSpace, "\177" },
+	{ XK_Insert,    "\033[2~" },
 	{ XK_Delete,    "\033[3~" },
 	{ XK_Home,      "\033[1~" },
 	{ XK_End,       "\033[4~" },