Use lsb_release for tracking Finnix version information

[Ryan Finnie]

apt-get install lsb-release

Create /etc/lsb-release in finnix-release:
DISTRIB_ID=Finnix
DISTRIB_RELEASE=104
DISTRIB_CODENAME=Appleton
DISTRIB_DESCRIPTION="Finnix 104"

Replace all checks of /etc/finnix-version with checks of /etc/lsb-release, either $DISTRIB_RELEASE or $DISTRIB_DESCRIPTION where appropriate. (Make sure it should always be safe to pull in as ". /etc/lsb-release")

Remove /etc/finnix-version from finnix-release.

Modify stage2 to copy /etc/lsb-release to initrd and use as appopriate.

The 4 variables were copied from an Ubuntu install; are there any other standardized variables that could be useful?

See how much "Finnix" could be relplaced by $DISTRIB_ID for rebranding remasters.

[Ryan Finnie (fo0bar)]

/usr/bin/lsb_release only seems concerned with ID, RELEASE, CODENAME and DESCRIPTION.

[Ryan Finnie (fo0bar)]

Update private combiso build script.

[Ryan Finnie (fo0bar)]

/etc/lsb-release implemented; initscripts, finnix-hwsubmit and initrd modified to use it. Leaving open to look for other stuff that can use it.

[Ryan Finnie (fo0bar)]

combiso updated, everything else looks good so far.