stage2: extend /boot cleaner stoplist

Minor fix: /boot directory is not cleaned for livecd if there are
homeros-install or luwrain-install files (in addition to live-install
and livecd-install being already checked).
homeros: replace chkconfig hooks with use/services

Things that had to be done by hand are now generalized
and made convenient, hopefully.
control: fix sudo-su target

use/control/sudo-su apparently lacked dependency on plain
use/control thus defeating the whole affair; thanks msp@
for spotting and reporting this.
vm-ssh: renamed to net-ssh and cleaned up

There was no need to split carrying over the pubkey
and tightening up permissions on the file and its parent
directory to be done in two separate scripts; this should
be more generic now as a bonus.

Users adjusted accordingly.
vm-net: feature retired

This one was replaced by the net feature completely
and has been declared obsolete since 1.1.1 (a month ago).

A few remaining users trivially adjusted.
armh: update warning in 50-sshd-root

It basically reads the same but was referring to a neighbour
script that has been moved to a separate deflogin feature
during heavy refactoring of initial implementation draft.
initial tty feature

This one only cares for serial console(s) in sysvinit case now
but might end up controlling the number of gettys for ve/vm, etc.
armh-{cubox,dovefb}: minor refactoring

The initial suggestion that any cubox image is a desktop one
didn't hold out for long; and xorg related bits are not that
related to boot script setup in terms of neccessity.
armh.mk: initial cubox-server

This one was asked for and is pretty reasonable common base
to play with cubox from scratch (being ALT); the intermediate
targets had to be refactored with:

- vm/.cubox-bare becoming *that* bare (it doesn't even
  warrant an init anymore, let alone xorg);
- vm/.cubox-desktop accomodating most of desktop bits;
- vm/.cubox-base becoming vm/.cubox-oem as it should be.

The just-introduced tty feature is employed either.
armh.mk: tweak vm/arm-server too

basesystem doesn't warrant an init these days apparently,
let's make sure one does land here.
firmware: drop firmware-amd-ucode

It's merged into firmware-linux, thanks lakostis@
for the explanation; P:/O: should be added
but less line noise is better anyways.
1.1.6-alt1

- vm-net retired
gear-store-tags