[newsbeuter/f17] (6 commits) ...Add remaining missing includes

[Ben Boeckel]

Summary of changes:

  b81d183... Spec cleanups (*)
  d161ff6... Add json-c-devel BR (*)
  8abd48a... Add a patch for missing unistd.h include (*)
  d1df30c... Another missing include (*)
  cf6bfe5... And another... (*)
  35739b1... Add remaining missing includes (*)

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