zfs/debian: add packaging files

based on Debian's packaging work, but simplified:
- no DKMS
- no dracut
- no udebs

and remove old patches which were based on top of Debian's packaging.

Reviewed-by: Stoiko Ivanov <s.ivanov@proxmox.com>
Tested-by: Stoiko Ivanov <s.ivanov@proxmox.com>
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

zfs/debian/tree/zfsutils-linux/usr/lib/os-probes/10zvol-test

@@ -0,0 +1,14 @@
+#!/bin/sh
+# Sub-test to exclude ZVOLs
+set -e
+partition="$1"
+
+. /usr/share/os-prober/common.sh
+
+if [ "$(stat -L -c %t "$partition")" = "e6" ] ; then
+	debug "$1 is a ZVOL; skipping"
+	exit 0
+fi
+
+# No ZVOLs found
+exit 1