nsdiff - 1.85-2 main

The nsdiff program compares two versions of a DNS zone, and outputs the
differences between them as a dynamic DNS script for use with the nsupdate
program.
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This provides an elegant way to merge hand written static zone files into
otherwise dynamic zones.
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nsdiff supports comparing on-disk zone-files and retreiving both sides
via standard AXFR zone transfer, optionally autenticated with a TSIG
key.