bind9 bind 9.20.2

[Bruce Dubbs]

New point version.

[thomas]

Changes in 9.20.1:

​https://bind9.readthedocs.io/en/v9.20.1/notes.html#notes-for-bind-9-20-1

[thomas]

In addition to version upgrade, i'd like to add nsupdate to the bind-utils section as that tool might be useful for someone who has to maintain a DNS server but it is not required to have the full server suite installed for this tool.
Not sure whether rndc should be categorized as a client tool, too. If so, the instructions would change to

    make -C lib/isc    install
    make -C lib/dns    install
    make -C lib/ns     install
    make -C lib/isccfg install
    make -C lib/isccc  install
    make -C bin/dig    install
    make -C bin/nsupdate install
    make -C bin/rndc   install
    mkdir -p /usr/share/man/man{1,8}
    cp -v doc/man/{dig.1,host.1,nslookup.1,nsupdate.1} /usr/share/man/man1/
    cp -v doc/man/rndc.8 /usr/share/man/man8/

for the utils. Otherwise its just nsupdate:

    make -C lib/isc    install
    make -C lib/dns    install
    make -C lib/ns     install
    make -C lib/isccfg install
    make -C bin/dig    install
    make -C bin/nsupdate install
    mkdir -p /usr/share/man/man1
    cp -v doc/man/{dig.1,host.1,nslookup.1,nsupdate.1} /usr/share/man/man1/

[thomas]

Changelog: ​https://bind9.readthedocs.io/en/v9.20.2/notes.html#notes-for-bind-9-20-2

[thomas]

Fixed in [378990d3]