This file is indexed.

/usr/bin/exim4-localscan-plugin-config is in exim4-dev 4.82-3ubuntu2.4.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh

case "$1" in
    --localscan-apiversion)
        sed -rn 's/#define LOCAL_SCAN_ABI_VERSION_(MAJOR|MINOR) *([0-9]+).*/\2/p' \
            /usr/include/exim4/local_scan.h \
            | (read MAJOR; read MINOR; echo ${MAJOR}.${MINOR})
        ;;
    *)
        echo Usage: $0 --localscan-apiversion
	;;
esac