dselect/method.cc: pass admindir to dpkg

dselect/method.cc: pass admindir to dpkg
dselect/Makefile.in: fix rule to build helpmessages
dselect/curkeys.h: use curses.h instead of ncurses.h, since someone decided to play nasty and just remove that
scripts/: remove dpkg-safelist
dpkg-deb/build.c: remove dpkg-safelist calls
main/enquiry.c: redo formula to get fieldwidths for packages