Fix mojodb to use the new sky_server API also.

sky/HACKING.md

Index: sky/HACKING.md
diff --git a/sky/HACKING.md b/sky/HACKING.md
index 46a96b94c93d212678a0538acb1a2659af4d3cdc..de70d7d47d0cc88d6feededcee7e226921003bf1 100644
--- a/sky/HACKING.md
+++ b/sky/HACKING.md
@@ -60,3 +60,22 @@ We recommend using the [Dart
 ``test``](https://pub.dartlang.org/packages/test) testing framework.
 See [``sky/tests/raw/color_bounds.dart``](tests/raw/color_bounds.dart)
 for an example.
+
+Debugging Sky
+-------------
+
+This document aims to explain how to debug Sky itself.
+
+=== C++
+
+Launch a debug Sky build on Linux as follows (where `app.dart` is the
+test you are running and trying to debug):
+
+```bash
+mojodb start --gdb out/Debug app.dart

[eseidel, 2015/06/22 21:28:18]

These are soon to be deprecated instructions, care of the dev_tools work from
Paris.  You'd have to ask them what the new flow is however.  It may be
documented on mojo-dev.

+mojodb gdb_attach
+```
+
+=== Dart
+
+Use Observatory.