[zsh/f15] (2 commits) ...Update to new upstream version: Zsh 4.3.15

[Dominic Hopf]

Summary of changes:

  b9e1bb9... change the License field to MIT (RHBZ#768548) (*)
  9283c33... Update to new upstream version: Zsh 4.3.15 (*)

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