configure.in: don't try to outguess what CFLAGS should be

configure.in: don't try to outguess what CFLAGS should be
scripts/update-alternatives.8: fix typo
`Merge Marcus Brinkman patches day':
+ scripts/dpkg-architecture.pl: architecture -q should not imply -f
+ scripts/dpkg-shlibdeps.pl: build a list of packages instead of overwriting previous results.
+ utils/start-stop-daemon.c: update HURD specifics
+ configure.in: revamp HURD detection stuff
+ debian/rules: use dpkg-buildarchitecture to get proper info, set config_arg if we are crosscompiling
+ debian/rules: typo in clean target, scan start-stop-daemon for shlibdeps