Implement global apt preferences opt

  * Misc: fix 'humanname' processing
  * require salt-formula-salt=0.4+201812211629.9b3097a or higer
    - add dep. salt

Prod-relate: PROD-25786 (PROD:25786)

Change-Id: Ie93425d579a44e1a9775a37e9592530c1e0be02c
6 files changed