/etc/logcheck/ignore.d.server/acpid is in logcheck-database 1.3.17.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ acpid: action exited with status 0$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ acpid: [[:digit:]]+ client rule[s]{0,1} loaded$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ acpid: received event "[[:lower:]_/]+ [[:upper:][:digit:]]+ [[:xdigit:]]{8} [[:xdigit:]]{8}"$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ acpid: completed event "[[:lower:]_/]+ [[:upper:][:digit:]]+ [[:xdigit:]]{8} [[:xdigit:]]{8}"$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ acpid: client connected from [[:digit:]]+\[[[:digit:]]+:[[:digit:]]+\]$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ acpid: notifying client [[:digit:]]+\[[[:digit:]]+:[[:digit:]]+\]$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ acpid: executing action "/etc/acpi/(actions/){0,1}[[:alnum:]_]+\.sh( [[:lower:]_/]+( [[:upper:][:digit:]]+ [[:xdigit:]]{8} [[:xdigit:]]{8}){0,1}){0,1}"$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ acpid: client( [[:digit:]]+\[[[:digit:]]+:[[:digit:]]+\])? has disconnected$
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