prevent quite a lot of perl modules to be part of minimal basesystem by default

diff -up ./usr/lib/libDrakX/install/any.pm.tv7 ./usr/lib/libDrakX/install/any.pm
--- ./usr/lib/libDrakX/install/any.pm.tv7	2011-09-14 14:26:15.575519716 +0200
+++ ./usr/lib/libDrakX/install/any.pm	2011-09-14 14:28:09.803545863 +0200
@@ -553,6 +553,8 @@ sub default_packages {
     push @l, qw(acpi acpid mageia-gfxboot-theme);
     # will get auto selected at summary stage for firewall:
     push @l, qw(shorewall mandi-ifw);
+    # only needed for CDs/DVDs installations:
+    push @l, 'perl-Hal-Cdroms' if $o->{method} eq 'cdrom';
 
     my $dmi_BIOS = detect_devices::dmidecode_category('BIOS');
     my $dmi_Base_Board = detect_devices::dmidecode_category('Base Board');