[svn r62978] * introduce --hosts and --rsyncdirs optiosn

* re-sort option groups, disable some options for now
* add docstrings to execnet gatewaymanage
* streamline tests a bit
* unify debugging and tracing

--HG--
branch : trunk

py/test/plugin/pytest_plugintester.py

@@ -155,6 +155,9 @@ class PytestPluginHooks:
     def pyevent(self, eventname, *args, **kwargs):
         """ called for each testing event. """
 
+    def pyevent_trace(self, category, msg):
+        """ called for tracing events events. """
+
     def pyevent_internalerror(self, event):
         """ called for internal errors. """