po: Update Italian programs translation

Closes: #765748

Signed-off-by: Guillem Jover <guillem@debian.org>
po: Update Simplified Chinese programs translation

Closes: #765693

Signed-off-by: Guillem Jover <guillem@debian.org>
s-s-d: Add a new --remove-pidfile option

This is the counter-option to --make-pidfile, so that programs that need
their pidfile created can use an option to remove them without needing
to do that manually.
s-s-d(8): Mention --pid and --ppid in the DESCRIPTION section
scripts/t: Enable and fix minimal :native arch-qualifier tests
dpkg: Add invoke hooks for add-architecture and remove-architecture

Prompted-by: Helmut Grohne <helmut@subdivi.de>
dpkg: Reverse --verify-format logic to accept 'rpm' as valid

Closes: #765907
dpkg: Fix trigger dependency checks and cycle detection

Break dependency cycles on dependtry > 1 in trigproc(), before calling
dependencies_ok(). But if we have a dependency cycle where a package A
awaits triggers and package P has them pending, and both depend on each
other, the dependency cycle breaking code is not smart enough to break
it at the correct place, as the relationship is directional. So we handle
it specially on deppossi_ok_found(), in case we are in the cycle breaking
dependtry. Otherwise we just defer it, but do not record that it can be
fixed by trigger processing, because we would get into an inifite loop.

Move trigger cycle detection after dependency checks, so that it does
not detect bogus trigger cycles that would have been avoided simply by
the dependency checks and cycle breaking code.

Regression introduced in commit 35c1c59cfad75d75b3d98974ad201f95d932adb6.

Closes: #765434, #765668, #765734, #765781, #765789, #765952
dpkg: Rework dependency problem debug and notices on trigproc()

The dependencies_ok() function already prints adequate debugging
information, there's no point repeating it in the call site.

Add also a notice() in case we end up forcing the dependency.
Regenerate .pot files and merge .po files with them
Release 1.17.19
Bump version to 1.17.20