[gnuplot/f19] (3 commits) ...Rebase to 4.6.2

[Frantisek Kluknavsky]

Summary of changes:

  923e66a... Rebase to 4.6.2 (*)
  5dead05... Rebase to 4.6.2 (*)
  66578fd... Rebase to 4.6.2 (*)

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