Log Message:
Make the password dialogue banner display the netbsd PKGREVISION
number, if there was one (which, of course, makes me bump PKGREVISION
to 1 for all three xscreensaver pkgs (are we really supposed to bump
PKGREVISION for each pkg individually?)).  This eliminates the
confusion where pkg_info says version "4.14nb1" is installed, yet the
dialogue says it's onlu version "4.14".

Also, fix the conflicts for the screensaver pkg so that it properly
conflicts with xscreensaver-gnome<4.14 (not <1.14).