Review of debian/copyright for zfs-linux.

Imported-from: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=686447#307
Imported-by: Darik Horn <dajhorn@vanadac.com>

This patch improves `debian/copyright` formatting and policy conformance but
does not update its contents to reflect recent contributions.
Enable the dkms addon for debhelper.

Support for releases older than Ubuntu 12.04 LTS Precise Pangolin is
discontinued.
Normalize the override_dh_auto_install rule.

Move dh_install, dh_installinit, and dh_installudev commands into separate
overrides.

Move chmod commands into override_dh_fixperms and force the permissions onto
the build targets instead of the bundled tree, which should be read-only.
Drop upstream component removal patches.

The packaging overlay bundles optimized components that supercede some generic
upstream components. These components were patched-out of the upstream sources
to prevent build problems on older systems that are now unsupported.
Prune unnecessary components in the DKMS distdir.

In the zfs-dkms package, only bundle components that are actually used to
compile the ZoL kernel modules. This prevents several lintian complaints,
discourages users from running `make install` in /usr/src, and reduces the
binary package size by one third.

Also shorten `cp` shunt creation to a one-liner.
Add expat license to the debian/copyright file.

Resolve this lintian warning:

	W: zfs-linux source: missing-license-paragraph-in-dep5-copyright expat (paragraph at line 1260)
Update packaging to standards version 3.9.5

Resolve this lintian warning:

	W: zfs-linux source: ancient-standards-version 3.9.3 (current is 3.9.5)
Reindent descriptions in the debian/control file.

Resolve these lintian warnings:

	W: libuutil1: possible-unindented-list-in-extended-description
	W: libuutil1-dbg: possible-unindented-list-in-extended-description
Merge branch 'master/ubuntu/TRUNK' into master/ubuntu/utopic
Update changelog for 0.6.3-7~utopic release