teach register-plist that pkgspec-version is equivalent to pkgspec-=version

infrastructure/bin/register-plist

@@ -1,6 +1,6 @@
 #! /usr/bin/perl
 
-# $OpenBSD: register-plist,v 1.3 2010/11/07 00:01:40 espie Exp $
+# $OpenBSD: register-plist,v 1.4 2010/11/26 07:17:10 espie Exp $
 # Copyright (c) 2005
 # Marc Espie.  All rights reserved.
 # Redistribution and use in source and binary forms, with or without
@@ -221,6 +221,7 @@ sub compare
 sub forgetful_key
 {
 	my $self = shift;
+	$self->{name} =~ s/\-\=(\d)/\-$1/;
 	return join(':', 'depend', $self->{name}, $self->{pkgpath}, $self->{pattern});
 }