[DRE-maint] ruby-knife-acl is marked for autoremoval from testing

[Debian testing autoremoval watch]

ruby-knife-acl 1.0.3-1 is marked for autoremoval from testing on 2017-09-16

It (build-)depends on packages with these RC bugs:
869179: chef: FTBFS: Could not find 'net-ssh' (< 4.0, >= 2.9) - did find: [net-ssh-4.1.0] (Gem::LoadError)