[cloud-init/f22] (9 commits) ...Switch to dnf instead of yum when available

[gholms]

Summary of changes:

  69ff73f... Update changelog to match current release (*)
  daa1660... Stop depending on git to build
  22dbc1a... Stop implicitly listing doc files twice
  0a23a4d... Add recognition of 3 ecdsa-sha2-nistp* ssh key types
  a510c9b... Fix handling of user group lists that contain spaces
  851688f... Change network.target systemd deps to network-online.target
  c33ce8c... Ensure cloud-init.service doesn't write all over the login 
  469555b... Stop enabling services in %post
  37c3202... Switch to dnf instead of yum when available

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