auth: remove duplicate dns update section from the backend-writers-guide

diff --git a/docs/appendices/backend-writers-guide.rst b/docs/appendices/backend-writers-guide.rst
index 3d7d7f0587c683785e3fc0325fd3951084caba4d..4766771f77d6955444f2dc7e320dcd6816e1d87d 100644 (file)
--- a/docs/appendices/backend-writers-guide.rst
+++ b/docs/appendices/backend-writers-guide.rst
@@ -771,71 +771,6 @@ other update/remove functionality at a later stage.
   must be added to the zone. ``rrset`` can be empty in which case the
   method is used to remove a RRset.
 
-DNS update support
-------------------
-
-To make your backend DNS update compatible, it needs to implement a
-number of new functions and functions already used for slave-operation.
-The new functions are not DNS update specific and might be used for
-other update/remove functionality at a later stage.
-
-.. code-block:: cpp
-
-    class DNSBackend {
-    public:
-      /* ... */
-      virtual bool startTransaction(const string &qname, int id);
-      virtual bool commitTransaction();
-      virtual bool abortTransaction();
-      virtual bool feedRecord(const DNSResourceRecord &rr, string *ordername);
-      virtual bool replaceRRSet(uint32_t domain_id, const string& qname, const QType& qt, const vector<DNSResourceRecord>& rrset);
-      virtual bool listSubZone(const string &zone, int domain_id);
-      /* ... */
-    }
-
-.. cpp:function:: virtual bool DNSBackend::startTransaction(const string &qname, int id)
-
-  See :ref:`rw-slave`. Please note that this
-  function now receives a negative number (-1), which indicates that the
-  current zone data should NOT be deleted.
-
-.. cpp:function:: virtual bool DNSBackend::commitTransaction()
-
-  See :ref:`rw-slave`.
-
-.. cpp:function:: virtual bool DNSBackend::abortTransaction()
-
-  See :ref:`rw-slave`. Method is called when an exception is received.
-
-.. cpp:function:: virtual bool DNSBackend::feedRecord(const DNSResourceRecord &rr, string *ordername)
-
-  See :ref:`rw-slave`. Please keep in mind
-  that the zone is not empty because :func:`DNSBackend::startTransaction` was called
-  different.
-
-.. cpp:function:: virtual bool DNSBackend::listSubZone(const string &name, int domain_id)
-
-  This method is needed for rectification of a zone after NS-records
-  have been added. For DNSSEC, we need to know which records are below
-  the currently added record. ``listSubZone()`` is used like ``list()``
-  which means PowerDNS will call ``get()`` after this method. The
-  default SQL query looks something like this::
-
-    // First %s is 'sub.zone.com', second %s is '*.sub.zone.com'
-    select content,ttl,prio,type,domain_id,name from records where (name='%s' OR name like '%s') and domain_id=%d
-
-  The method is not only used when adding records, but also to correct
-  ENT-records in powerdns. Make sure it returns every record in the tree
-  below the given record.
-
-.. cpp:function:: virtual bool DNSBackend::replaceRRSet(uint32_t domain_id, const string& qname, const QType& qt, const vector<DNSResourceRecord>& rrset)
-
-  This method should remove all the records with ``qname`` of type ``qt``.
-  ``qt`` might also be ANY, which means all the records with that
-  ``qname`` need to be removed. After removal, the records in ``rrset``
-  must be added to the zone. ``rrset`` can be empty in which case the
-  method is used to remove a RRset.
-
 Miscellaneous
 -------------