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When installling the packages in new root, the update-extlinux trigger
script will be executed. We make sure this does not fail by:
 - run extlinux --install before we install packages
 - mount /dev and /proc for the chroot
 - temprorary disable grsecurity's chroot_caps

ref #1213

Thanks to Jim Pryor for the very useful feedback.

Not needed.

Thanks to Jim Pryor for pointing this out.

we need anchor on both sides.

Thanks to Jim Pryor for pointing this out.

Make it a bit more clear what is going on by moving initialization
of mnt_boot to same place for both cases.

And remove redundant code line.

Thanks to Jim Pryor for pointing this out.

fix case when mountpoint is a prefix of other mount. For example:

 setup-disk /d

which would also match /dev and create various bogus entries in the
generated fstab.

Thanks to Jim Pryor for pointing this out.

Thanks to Jim Pryor for pointing this out.

fixes #715

use 2 * total ram or maximum 1/4 of the smallest disk.
don't use more than 4G swap
if swap is smaller than 64MB then don't bother create swap at all.

ref #732

ref #678

ref #674

ref #673

So you can specify more than one disk

- always install syslinux
- add lvm to runlevel boot
- fix local variable $size
- dont display the /dev/ prefix on disk info

and fix help to include LVM option
ref #592

It makes more sense to talk about a system disk and data disk.

We only want fiddle with MBR if we use new disks and not if we install
on a mounted root