-/* Extract the AUTHORITY info from the answer. If the
-answer isn't authoritive (AA) we do not extract anything.
-We've to search for SOA or NS records, since there may be
-other records (e.g. NSEC3) too.
-*/
+/* Extract the AUTHORITY information from the answer. If the
+answer isn't authoritive (AA not set), we do not extract anything.
+
+The AUTHORITIVE section contains NS records if
+the name in question was found, it contains a SOA record
+otherwise. (This is just from experience and some tests, is there
+some spec?)
+
+We've cycle through the AUTHORITY section, since it may contain
+other records (e.g. NSEC3) too. */