[libpng10/el6] (12 commits) ...Merge branch 'master' into el6

[Paul Howarth]

Summary of changes:

  2f6af69... Fix typo that causes a failure to update the common directo (*)
  46ebc98... update to 1.0.51 (*)
  c82ab6a... update to 1.0.52 (minor changes, see ANNOUNCE for details) (*)
  75c586c... add upstream fix reinstating PNG_READ_16_TO_8_SUPPORTED and (*)
  8c0ceca... - update to 1.0.53 (minor changes, see ANNOUNCE for details (*)
  01794b0... Add CVE-2010-0205 reference in changelog (*)
  fa7f8da... - update to 1.0.54 - fixes CVE-2010-1205 (out-of-bounds wri (*)
  3a091f1... dist-git conversion (*)
  d5938f7... - Rebuilt for https://fedoraproject.org/wiki/Fedora_15_Mass (*)
  ceb2d83... Nobody else likes macros for commands (*)
  a6634ec... CVE-2011-2501 (regression of CVE-2004-0421) (*)
  4742e99... Merge branch 'master' into el6 (*)

(*) This commit already existed in another branch; no separate mail sent