Bug#925379: linux-base: linux-version vmlinuz/vmlinux dichotomy, breaks at least m68k

[Thorsten Glaser <tg@mirbsd.de>]

Package: linux-base
Version: 4.5
Severity: important
Control: affects -1 initramfs-tools

Some time between 4.1.0-2 and 4.19.0-3, m68k kernels switched
from vmlinuz-* to vmlinux-*:

-rwxr-xr-x 1 root root 5933276 Feb 11 16:55 vmlinux-4.19.0-3-m68k*
-rwxr-xr-x 1 root root 5933284 Mar 15 02:16 vmlinux-4.19.0-4-m68k*
-rw-r--r-- 1 root root 1769849 Aug 26  2015 vmlinuz-4.1.0-2-m68k

I was surprised by that 4.1.0-2 was the initrd updated by the
initramfs-tools trigger on e2fsprogs update, before I purged
(apt-get --purge autoremove) the 4.1.0-2 kernel, having just
received the 4.19.0-4 one in a dist-upgrade.

This is because /usr/share/perl5/DebianLinux.pm was not updated
accordingly:

	# Find kernel image name stem for this architecture
	my $image_stem;
	if ((uname())[4] =~ /^(?:mips|parisc|powerpc|ppc)/) {
	    $image_stem = 'vmlinux';
	} else {
	    $image_stem = 'vmlinuz';
	}

Since architectures can have both vmlinux-* and vmlinuz-*,
I think this logic should be reconsidered and removed, as
to instead take kernel images from both basenames.

At the absolutely very least, it must be brought in line
with current practicēs… however, that may break during
upgrades, so, please redo it taking both names into account.

-- System Information:
Debian Release: buster/sid
  APT prefers unreleased
  APT policy: (500, 'unreleased'), (500, 'unstable')
Architecture: m68k

Kernel: Linux 4.19.0-3-m68k
Locale: LANG=C, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=C (charmap=UTF-8)
Shell: /bin/sh linked to /bin/lksh
Init: sysvinit (via /sbin/init)

Versions of packages linux-base depends on:
ii  debconf [debconf-2.0]  1.5.71

linux-base recommends no packages.

linux-base suggests no packages.

-- debconf information:
* linux-base/disk-id-convert-auto: true
  linux-base/removing-title:
* linux-base/disk-id-manual-boot-loader:
  linux-base/disk-id-convert-plan-no-relabel: true
* linux-base/disk-id-convert-plan: true
  linux-base/removing-running-kernel: true
  linux-base/disk-id-manual:
  linux-base/do-bootloader-default-changed:
  linux-base/disk-id-update-failed: