I've orphaned the following packages:
chicken Christian Kellermann
iperf Battu Kaushik
libfakesu Daniel Boland
libnfc Marcos Vives Del Sol
procmail Daniel Boland
sendmail Daniel Boland
varnish Jorge Diaz
The maintainers of which have been inactive for a long time (no activity
since 2015), and didn't respond to my attempts to contact them.
Consequently, these maintainers' (long unused) ssh keys are also disabled.
Again, these packages are all leaves in the dependency tree, and so
maybe also candidates for removal.