Bug#926875: initramfs-tools backward compatibility removal

[Florian Strankowski <fs@uniquoo.com>]

Package: initramfs-tools
Version: 0.130

When ifdown is invoked, it still checks for IFDOWN beeing supplied 
within /conf/initramfs.conf. Due to the nature of evolution, this has 
been moved to /etc/dropbear-initramfs/config within the release of stretch.

#######

if grep -q ^DROPBEAR_IFDOWN= /conf/initramfs.conf; then
    # XXX backward compatibility; remove once Stretch is the current stable
    . /conf/initramfs.conf
    IFDOWN="$DROPBEAR_IFDOWN"
fi
if [ -e /etc/dropbear/config ]; then
    . /etc/dropbear/config
fi

#######

I suggest to move the checks to the accordingly right file which is now 
/etc/dropbear-initramfs/config. Further a backward-compability check for 
upgraded systems should be in place or a warning (like when setting up 
cryptotools) to move already set variables like "IFDOWN=" to the 
appropriate new configuration-path (see above).


----

Florian Strankowski
uniquoo UG i.G.
Adolph-Schönfelder-Straße 68
22083 Hamburg, Germany