Port to fabric2; add example config

multiball.cfg.example

@@ -0,0 +1,44 @@
+[config]
+history=multiball.history
+sshconfigs=~/.ssh/config
+hostlists=
+
+[startup]
+
+[cmd.upgrade]
+/unsafe
+/targets
+/confirm Targeting these, ok?
+/env DEBIAN_FRONTEND=noninteractive
+sudo -E apt -y upgrade
+/confirm Do they need to be rebooted?
+sudo reboot
+
+
+[cmd.install-pkg]
+/arguments
+/unsafe
+/targets
+/confirm Installing `{@}` on these, ok?
+/env DEBIAN_FRONTEND=noninteractive
+sudo -E apt -y install {@}
+/confirm Do they need to be rebooted?
+sudo reboot
+
+[cmd.upgrade-pkg]
+/arguments
+/unsafe
+/targets
+/confirm Installing `{@}` on these, ok?
+/env DEBIAN_FRONTEND=noninteractive
+sudo -E apt -y install --only-upgrade {@}
+
+[cmd.last-updated]
+/safe sudo zgrep -B1 'apt-get upgrade' /var/log/apt/* | grep 'Start' | cut -d'z' -f2 | sort | tail -n1 | cut -d' ' -f2 || true
+
+[cmd.upgradable]
+/safe apt list --upgradable 2>&1 | grep upgradable | grep -v WARNING || true
+
+[cmd.ping]
+/safe echo ping
+