systemd: improve user session support
base: update keywords, use flags and base packages
mdadm: force a static build of mdadm
ntp: remove pidfile which is not written at all
mysql: only install xtrabackup on zentoo nodes
update bundle
rvm: add some LWRPs to install rubies and gemsets
portage: improve logging
postgresql: fix LWRPs
tmux: fix escape key delay
update production env