Log Message:
upgrade to 2.0.1.

NSD 2.0.1 release notes:

BUG FIXES:
	 - Queries for QTYPE DS (DNSSEC) were not handled correctly in
	   certain cases.
	 - Partial support for unknown RRs.  Known RR types with
	   unknown RR data format is not yet supported.
	 - Bug #75: Fixed bad error message when nsdc update is run for
	   the first time.
	 - Bug #78: Multiple zones, each with include directives, are
	   now compiled correctly.