Log Message:
NSD 4.1.6
=========
BUG FIXES:
        - Fix #701: Fix that AD=1 set in a BADVERS response.
        - Fix typo in zonec.c inside error message.
        - Fix #711: Document that debug-mode yes is used for staying
          attached to the supervisor console.
        - Document verbosity 3 prints more information.
        - nsd-checkconf warns for master zones with no zonefile statement.
        - Fix start failure when many file descriptors are in use.
        - The servfail rcode is not printed with a space in the middle.
        - print failed token for config syntax error or parse error.