/etc/logcheck/ignore.d.server/tftpd is in logcheck-database 1.3.16.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ in.tftpd\[[0-9]+\]: connect from [._[:alnum:]-]+ \([.[:digit:]]+\)$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ tftpd\[[0-9]+\]: tftpd: trying to get file: [^[:space:]]+$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ tftpd\[[0-9]+\]: tftpd: serving file from .*$
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