start-stop-daemon: sync with Debian

Hello again, Guillem Jover apparantly swept out his repo which brings two changesets that avoid some needless bytes of memory footprint and As a side effect now a missing group after ‘:’ on --chuid is a fatal error. Find attached a diff on top of [3.2] that brings in [3db7a6e,bc07306] of dpkg.git and adjusts crux-patch.diff accordingly. (I've taken the opportunity to remove the no longer used xstrdup() function which blows the diff a bit; i'm too lazy to take appropriate upstream steps, hmm.) Looking forward for a nice, small and stable 3.2 system, Ciao, --steffen