/etc/dpkg/dpkg.cfg.d/pkgconf-hook-config is in pkgconf 0.9.12-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | post-invoke=if { test "$DPKG_HOOK_ACTION" = add-architecture || test "$DPKG_HOOK_ACTION" = remove-architecture; } && test -x /usr/share/pkgconf-dpkghook; then /usr/share/pkgconf-dpkghook update; fi
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