These are used to signal the start of the document in a stream of many
documents. As Ansible only supports one YAML document per file this is
unnecessary. About a third of our YAML documents already lacked these.

This is meant as a internal authenticated and encrypted network which we
can use for internal services, we don't want to expose to the internet
or when encryption is desired but not easily implementable.

This adds a collaborative markdown editor as newly offered service which
is available via login for all Arch Linux Staff with an option to allow
anonymous edits by users (not default). Users are managed via keycloak
and require the Staff role to be allowed in, non staff keycloak users
currently will receive an internal server error due to an upstream
issue.

Zabbix has been replaced by Prometheus for monitoring our services.

Signed-off-by: Florian Pritz <bluewind@xinu.at>