It is very strange that earlier in STAGE1 added kernel modules from
a variable STAGE1_KMODULES_REGEXP only.
This commit makes the drm feature work properly.

use/bootloader/uboot needed uboot packages.

Removed from Sisyphus.
See-also: git.altlinux.org/tasks/archive/done/_254/261032

ncpfs has been removed from Sisyphus.
Also-see: http://git.altlinux.org/tasks/archive/done/_254/260819/

use/repo/main for vm targets will now create and enable the main
repository in /ALTLinux on rootfs.

The drm feature solves the problem of creating a common entry
point for adding kernel drm modules for different package lists.
The need for allocation into a separate feature arose from one
parties to the need to make a switch between free and proprietary
NVIDIA driver, on the other, because of the need to add only drm
modules kernels for purposes such as use/stage2/kms and use/plymouth.

Also no more switch needed for RADEON, as only the free video driver
remains.

- apply server-v 9.1 release patches (thanks shaba@)
- apply e2k patches (mike@)
- mipsel-bfk3: Fix /etc/fstab generation (thanks iv@)
- Rename all RPMs to canonical names before genbasedir (thanks boyars@)
- gnustep: Fix build
- oem: Add use/oem/no-cleanup
- deflogin: Now you can add a user with specific uid, gid and so on

Variable SPECIAL_USER must have the following format:
user:group:uid:gid:homedir:shell
Example:
@$(call set,SPEC_USER,user:user:500:500:/home/user:/bin/bash)

See-also: http://webery.altlinux.org/task/219064

This bug was introduced in c310a1e9 and was
breaking bfk3 builds ever since.