Remove (partially defined out) code and data structures dealing with
multiple ELF versions. There hasn't been a new ELF version in the
last 20 years. Simplify the code a bit by just assuming there will
only be one version (EV_CURRENT == 1).

Simplifies elf_version, gets rid of __libelf_version_initialized.
Removes one (or more) array (version) dimension from various tables
and accessor functions (__elf_xfctstom, shtype_map, __libelf_data_type,
__libelf_type_aligns and __libelf_type_sizes).

Signed-off-by: Mark Wielaard <mark@klomp.org>`

* Change name from "Red Hat elfutils" to "elfutils".
* Update license of standalone tools and test from GPLv2 to GPLv3+.
* Change license of libraries from GPLv2+exception to GPLv2/LGPLv3+.
* Add Developer Certificate of Origin based contributor policy.

top-level:

- COPYING: Upgraded from GPLv2 to GPLv3.
- CONTRIBUTING, COPYING-GPLv2, COPYING-LGPLv3: New files.
- NEWS: Added note about new contribution and license policy.
- Makefile.am: Updated to GPLv3, added new files to EXTRA_DIST.
- configure.ac: Update to GPLv3, changed AC_INIT name to 'elfutils'.

backends, lib, libasm, libcpu, libdw, libdwfl, libebl, libelf:

- All files updated to GPLv2/LGPLv3+. Except some very small files
  (<5 lines) which didn't have any headers at all before, the linker
  .maps files and the libcpu/defs files which only contain data and
  libelf/elf.h which comes from glibc and is under LGPLv2+.

config:

- elfutils.spec.in: Add new License: headers and new %doc files.
- Update all license headers to GPLv2/LGPLv3+ for files used by libs.

src, tests:

- All files updated to GPLv3+. Except for the test bz2 data files, the
  linker maps and script files and some very small files (<5 lines)
  that don't have any headers.

Signed-off-by: Richard Fontana <rfontana@redhat.com>
Signed-off-by: Mark Wielaard <mjw@redhat.com>

            to branch 'com.redhat.elfutils' (head c5a11b6b3329382f1b5ffd0020f0d93c64176f20)

            to branch 'com.redhat.elfutils' (head bb519012dee7013b2cab5c2f5ed465cb3821b063)

            to branch 'com.redhat.elfutils' (head 76e26cb54695fd3b21ee8fb5be3036bd68200633)