b471154 Update to 9.16.8

Authored and Committed by pemensik 3 years ago
    Update to 9.16.8
    
    DNS Flag Day 2020 - reduced default EDNS buffer to 1232.
    New rndc dnssec -rollover command.
    
    https://downloads.isc.org/isc/bind9/9.16.8/doc/arm/html/notes.html#notes-for-bind-9-16-8
    
        
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