Merge branch 'test_lame_root'

tests/testdata/iter_lame_root.rpl

+CONFIG_END
+SCENARIO_BEGIN Test iterative resolve with lame root.
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 100
+	ADDRESS 193.0.14.129 
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR RA SERVFAIL 
+SECTION QUESTION
+. IN NS
+ENTRY_END
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; recursion happens here.
+STEP 10 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA SERVFAIL 
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+SCENARIO_END