add up script to update services with changed configurations only

deprecate storage.tsdb.retention directive to prometheus

Fix Portainer console access, Grafana 6.3.2, Karma 0.43, Portainer 1.…

…22.0, Portainer Agent 1.4.0

move to Netdata rpm rather than compiled installation

set all datasources to default, usually Prometheus or Trickster

move to bborysenko/prometheus-swarm-discovery container image

Set net.ipv4.tcp_sack=0 to mitigate CVE-2019-11479

add combined log to caddy container stdout, rev Grafana to 6.2.5

set alertmanager storage.path=/home as container runs now as nobody

add a note about new swarmstack/loki project for container logs