[ekiga] Add doxygen info

[Eugen Dedu <ededu src gnome org>]

commit e87f30ea0639b3900d1f0bd1b26d97ecf0d68aa3
Author: Eugen Dedu <Eugen Dedu pu-pm univ-fcomte fr>
Date:   Mon Apr 20 18:29:19 2009 +0200

    Add doxygen info
---
 HACKING |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/HACKING b/HACKING
index 67b9b68..0a944f3 100644
--- a/HACKING
+++ b/HACKING
@@ -18,4 +18,8 @@ Developers:
   Ekiga.  The .h corresponding to the .cpp file must be included
   before the other includes.  Libraries headers includes must follow
   the application headers includes.  ../config.h must be included
-  before the rest in all .cpp files.
\ No newline at end of file
+  before the rest in all .cpp files.
+- Doxygen: We suggest the JavaDoc style.  It takes a "!" as designator
+  after a normal C/C++ comment begin.  This is followed by specific
+  keywords.  See the code for examples, such as
+  lib/engine/videoinput/videinput-manager.h.
\ No newline at end of file