The version you requested (4.4.0-1013.22) is not available, but a newer one is (4.4.0-1017.26). We redirected you there.
This file is indexed.

/usr/lib/exim4/local_scan/ is in exim4-daemon-heavy 4.76-3ubuntu3.4.

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