live user is configured for build if builder-useradd is installed.

Also:
- added ~/.mkimage/profiles.mk for use this apt.conf's from
  mkimage-profiles with variable BRANCH.
- use local cache packages in ~/apt/ for to reduce the time of
  repeated builds.
- use mirror yandex, because faster
- repo ports is not signed.

grub.iso is available for more platforms.

Another minor facelift:
- s/ALT Linux/ALT/gc (where applicable);
- s/7.0/8.0/g;
- 2017;
- e2k;
- links.

This one has been proposed by Oleg Ivanov again,
and more are supposed to come as people use it.

This has been suggested by Oleg Ivanov:

http://lists.altlinux.org/pipermail/antique/2015-May/002353.html

...and does make sense; additions are welcome.

Ah, and fix that silly thinko with ~/.zshrc perms while at that.

It's entirely unclear to an unsuspecting curious user
where the actual results of a proposed example hasher
build end up; that's ~/hasher/repo, just state that.

There were quite a few things missing:
- packager pseudo for both rpm and hasher;
- proper target (so that i686 or athlon don't confuse people);
- hasher repo for apt so that mkimage would use it too;
- last but not least, a friendly bootstrap message! ;-)

This should have been done back when live feature
has been ported to use deflogin feature indeed :-/

New mksquashfs requires /proc; mkimage 0.2.15 takes care for that;
it's time for this feature to get accustomed either.

...instead of setting up pam_mktemp ourselves
even if that was no big deal too.

su wasn't making it into the image breaking ~/.git setup,
and there's no reason for a full default boot timeout either.

Initial openSUSE package base taming effort has shown that
relatively few things should be fixed; subst has been generalized
as -i option to sed(1) since its introduction, so let's just fix it.

If you make distro/live-builder.iso, the result is an image
containing almost everything (short of actual full enough
repository) to rebuild itself.  It will attempt to configure
eth0 with DHCP and reach http://ftp.altlinux.org for packages.

RAM requirements start with 2Gb, self-build is accomplished
on a 4Gb host with "make CLEAN=1 distro/live-builder.iso".

Packages required for "make distro/syslinux.iso" get included.

(some due fixups all over the place too)