Looks like this helps installers with 5.4.0-2.20 based kernel
to install fine on Elbrus 801-PC with Radeon RX 580.

pwmd is finally available on all of v3/v4/v5 subarches,
and there's an installer feature for v4/v5 specifically.

use/e2k/multiseat/full invoked from many targets, regardless of the
fact that it is e2k.

No need to switch udisks2 into "shared mode" anymore;
see the previous commit.

There might be a more generic approach
but let's at least make this possible
in the first place.

...to the multiseat target.

Not that it's exported anyways!

This one is going to need adaptation for each private repo
but eventually should be gone in favour of sisyphus-mirror.

It's not ready yet with upgrade locked by ftbfs (msct#5248 et al).

This one is to be enabled by a server sysadmin at the moment,
so rather disable it explicitly.

This package contains both the fan control service
(disabled by default so sort of safe) and the manual
fanspeed.sh (that we rather need to provide out-of-box).

...by providing common targets for 801-PC and 101-PC distro needs.

This commit is packing a bunch of changes that went
into RELENG-e2k-workstation during its forked
development; it covers three distinct things:

- boot.conf preparation for firmware to load the image;
- fixup of packages common for e2k images;
- major cleanup of obsolete/unused cruft
  (unified kernel and reliable xorg autodetection
  allow us to move away from canned machine-specific
  configurations for the most part).

...to setup kms/xorg videodrivers for installer.

This is meant to provide failsafe configuration by default,
at least until mga2 works reliably for me.

None of Elbrus systems I had a chance to use as root
had any problems regarding TRIM feature of SSDs these
used to carry/support; let's start with e2k and maybe
carry over to x86 later.

Elbrus 101-PC was initially supported through kernel
modesetting driver only, now it's got a sort of native
driver running on ALT too.

...which will only result in a FAILED message,
most probably the solitary one throughout the
whole sysvinit boot.

The goal was simple: every use/e2k/{x11,install2}/$MACHINE
must be self-sufficient regarding platform support, that is
it must depend on the corresponding CPU-specific target.

A bit less make-tech but still better overall.

NB: llvm cleanup is not needed anymore after upgrade to
    Mesa-17/llvm-3.7, should be dropped like this year.

Forgot to do that before merging, sorry.

(xorg-drv-ati cares for dependencies
but we still prefer modesetting driver
in the installers to make them versatile)

Elbrus-801 and -101 are now added; 401's support refactored
and modified to cover 4.4 server system as well.

Weird it got overlooked in the first place.

Radeon HDMI as the default soundcard isn't really optimal,
and trying to push 44100 kHz samples towards 48 kHz interface
isn't going to sound great; provide sane ALSA dmix defaults
for Elbrus-401 PC workstation.

The early builds used to rely upon a non-committed
rootfs/files/etc/X11/xorg.conf within this feature
which was a bit annoying and would have screwed an
Elbrus system based on any other GPU.

So let's provide some flexibility by packaging it.

Elbrus 2000 only takes us a few lines to get up and running ;-)