Update to 2.3. Update HOMEPAGE and MASTER_SITES. Set packager information.

* Noteworthy changes in release 2.3 (2009-07-29) [stable]
- Libtasn1 is now an official GNU project.
- Solve build problem on Tru64 related to TRUE/FALSE.
- More careful decoding of OIDs.
- Fixed warning in ASN1.y.
- Use "Software libraries" info dircategory.
- Drop GPL/LGPL copies from the manual (not needed there).
- New configure parameters to set packaging specific information.
  The parameters are --with-packager, --with-packager-version, and
  --with-packager-bug-reports.  See
  <http://article.gmane.org/gmane.comp.lib.gnulib.bugs/17791> for more
  details.

(wiz)