Debian packages that has this binary:
/usr/share/doc/libmagpie-perl/examples/debug_xslt/bin/app.psgi
/usr/share/doc/libpoet-perl/examples/blog/bin/app.psgi
/usr/share/perl5/auto/share/dist/Poet/generate.skel/bin/app.psgi
/usr/share/otrs/bin/cgi-bin/app.psgi