[palo patch] Implement CTRL-U functionality

I keep on meaning to do this, and have finally done it.....

The attached patch makes the palo "editor" understand CTRL-U, so that 
you can quickly clear out a particular command line parameter.

Any comments? If not I will commit this in a few days, and hope that the 
Debian/Ubuntu/Gentoo folks eventually pick it up :)

randolph

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diff --git a/ipl/lib.c b/ipl/lib.c
index 544385e..06d790c 100644
--- a/ipl/lib.c
+++ b/ipl/lib.c
@@ -242,6 +242,17 @@ char *enter_text(char *txt, int maxchars)
 		putchar(' ');
 		putchar(c);
 	    }
+	} else if (c == 21)
+	{			/* CTRL-U */
+	    while (pos)
+	    {
+		pos--;
+		c='\b';
+		putchar(c);
+		putchar(' ');
+		putchar(c);
+	    }
+	    txt[0] = 0;
 	} else if ((pos < maxchars) && c >= ' ')
 	{
 	    txt[pos] = c;