[mimedefang/el6] (4 commits) ...Merge remote branch 'origin/master' into el6

[Robert Scheck]

Summary of changes:

  94b760b... Removed requirement on sendmail-cf for postfix (#754847) (*)
  ec57b0d... - Rebuilt for https://fedoraproject.org/wiki/Fedora_17_Mass (*)
  0530438... Upgrade to 2.73 (#759805, thanks to Philip Prindeville) (*)
  0c4231d... Merge remote branch 'origin/master' into el6

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