*.yml: Add some header comments.

[distorted-ansible] / ansible.cfg

### -*-conf-*-

[defaults]
gathering = smart
transport = ssh
hostfile = hosts/gen
legacy_playbook_variables = False
remote_user = root
nocows = True
forks = 32

[ssh_connection]
ssh_args = -oControlMaster=auto -oControlPersist=10m
control_path = ~/.ssh/sock-%%l/control-%%r@%%h:%%p
scp_if_ssh = True
pipelining = True