social: implement enter/leave/messaging; psyc: improvements and fixes

- social: implement enter/leave, send/receive messages, slicer
- psyc, social: add struct GNUNET_PSYC_Message for single-fragment join messages
- psyc: add message callback in addition to message part callback
- client_manager, social, psyc, multicast: add disconnect callback

1 files changed, 9 insertions, 0 deletions

diff --git a/src/include/gnunet_common.h b/src/include/gnunet_common.h
index d8444e100..2b501f91f 100644
--- a/src/include/gnunet_common.h
+++ b/src/include/gnunet_common.h
@@ -264,6 +264,15 @@ typedef int
                             const char *filename);
 
 
+/**
+ * Generic continuation callback.
+ *
+ * @param cls  Closure.
+ */
+typedef void
+(*GNUNET_ContinuationCallback) (void *cls);
+
+
 /* ****************************** logging ***************************** */
 
 /**