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diff --git a/external/unbound/libunbound/python/doc/examples/example4.rst b/external/unbound/libunbound/python/doc/examples/example4.rst
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--- a/external/unbound/libunbound/python/doc/examples/example4.rst
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@@ -1,36 +0,0 @@
-.. _example_examine:
-
-DNSSEC validator
-================
-
-This example program performs DNSSEC validation of a DNS lookup.
-
-Source code
------------
-
-::
-
-    #!/usr/bin/python
-    import os
-    from unbound import ub_ctx,RR_TYPE_A,RR_CLASS_IN
-
-    ctx = ub_ctx()
-    ctx.resolvconf("/etc/resolv.conf")
-    if (os.path.isfile("keys")):
-        ctx.add_ta_file("keys") #read public keys for DNSSEC verification
-
-    status, result = ctx.resolve("www.nic.cz", RR_TYPE_A, RR_CLASS_IN)
-    if status == 0 and result.havedata:
-
-        print "Result:", result.data.address_list
-
-        if result.secure:
-            print "Result is secure"
-        elif result.bogus:
-            print "Result is bogus"
-        else:
-            print "Result is insecure"
-
-More detailed informations can be seen in libUnbound DNSSEC tutorial `here`_.
-
-.. _here: http://www.unbound.net/documentation/libunbound-tutorial-6.html