Alter copyright notices slightly. Actual license is unchanged!
This alters all copyright notices to use the Free Software Foundation's recommendations for license notices; from <https://www.gnu.org/licenses/gpl-howto.html>:
For programs that are more than one file, it is better to replace “this program” with the name of the program, and begin the statement with a line saying “This file is part of NAME”.
|| dpkg --compare-versions "$2" eq "1.8.0-1~bpo9+1"; then
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if grep --quiet --regexp='^[[:space:]]*key_id[[:space:]]*=[[:space:]]*[Ee]3[Bb]0[Cc]44298[Ff][Cc]1[Cc]149[Aa][Ff][Bb][Ff]4[Cc]8996[Ff][Bb]92427[Aa][Ee]41[Ee]4649[Bb]934[Cc][Aa]495991[Bb]7852[Bb]855[[:space:]]*$' /etc/mandos/clients.conf; then