- Added generic EDNS code for registering known EDNS option codes,

bypassing the cache response stage and uniquifying mesh states. Four EDNS
  option lists were added to module_qstate (module_qstate.edns_opts_*) to
  store EDNS options from/to front/back side.
- Added two flags to module_qstate (no_cache_lookup, no_cache_store) that
  control the modules' cache interactions.
- Added code for registering inplace callback functions. The registered
  functions can be called just before replying with local data or Chaos,
  replying from cache, replying with SERVFAIL, replying with a resolved
  query, sending a query to a nameserver. The functions can inspect the
  available data and maybe change response/query related data (i.e. append
  EDNS options).
- Updated Python module for the above.
- Updated Python documentation.



git-svn-id: file:///svn/unbound/trunk@3947 be551aaa-1e26-0410-a405-d3ace91eadb9

libunbound/python/doc/examples/example3.rst

@@ -1,12 +1,14 @@
 .. _example_asynch:
 
-==============================
 Asynchronous lookup
-==============================
+===================
 
 This example performs the name lookup in the background. 
 The main program keeps running while the name is resolved. 
 
+Source code
+-----------
+
 ::
 
 	#!/usr/bin/python
@@ -33,4 +35,5 @@ The main program keeps running while the name is resolved.
 	if (status != 0):
 		print "Resolve error:", unbound.ub_strerror(status)
 
-The :meth:`unbound.ub_ctx.resolve_async` method is able to pass on any Python object. In this example, we used a dictionary object `my_data`.
+The :meth:`unbound.ub_ctx.resolve_async` method is able to pass on any Python
+object. In this example, we used a dictionary object ``my_data``.