Handle backspace on serial input and output better. Better solutions are welcome.

29d8c2ee · Austin Clements · bab819ed · 29d8c2ee
--- a/console.c
+++ b/console.c
@@ -163,7 +163,12 @@ consputc(int c)
      ;
  }

-  uartputc(c);
+  if (c == BACKSPACE) {
+    uartputc('\b');
+    uartputc(' ');
+    uartputc('\b');
+  } else
+    uartputc(c);
  cgaputc(c);
 }

@@ -198,6 +203,7 @@ consoleintr(int (*getc)(void))
      }
      break;
    case C('H'):  // Backspace
+    case '\x7f':
      if(input.e != input.w){
        input.e--;
        consputc(BACKSPACE);