[master] changelog for #324

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+420.   [bug]*          jinmei, stephen
+       Updated the DB schema used in the SQLite3 data source so it can
+       use SQL indices more effectively.  The previous schema had several
+       issues in this sense and could be very slow for some queries on a
+       very large zone (especially for negative answers).  This change
+       requires a major version up of the schema; use b10-dbutil to
+       upgrade existing database files.  Note: 'make install' will fail
+       unless old DB files installed in the standard location have been
+       upgraded.
+       (Trac #324, git 8644866497053f91ada4e99abe444d7876ed00ff)
+
 419.   [bug]           jelte
        JSON handler has been improved; escaping now works correctly
        (including quotes in strings), and it now rejects more types of