[BusyBox] Control-W for busybox shells.

[James A. Morrison]

Hey, 

  Here is a patch to add Control-W support to the busybox shells.
This is against 1.00-pre3.

Jim

--- cmdedit.c.old	2003-10-28 19:35:04.000000000 -0500
+++ cmdedit.c	2003-10-28 19:35:08.000000000 -0500
@@ -1365,6 +1365,13 @@
 				redraw(cmdedit_y, len -= cursor);
 			}
 			break;
+		case 23:
+			/* Control-W -- Remove the last word */
+		        while (cursor > 0 && isspace(command[cursor-1]))
+				input_backspace();
+			while (cursor > 0 &&!isspace(command[cursor-1]))
+				input_backspace();
+			break;
 		case ESC:{
 			/* escape sequence follows */
 			if (safe_read(0, &c, 1) < 1)