[gdl/f16] (4 commits) ...Add patch to change plplot SetOpt to setopt

[Orion Poplawski]

Summary of changes:

  f996f4e... Rebuild for plplot 5.9.8 Add upstream patch to fix strsplit (*)
  f9df056... Add patch to add missing includes (*)
  0b059af... Fixup string usage (*)
  4e59895... Add patch to change plplot SetOpt to setopt (*)

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