lxc: kill use of screen, use lxc-start in daemon mode instead, add configurable log location
lxc: kill use of screen, use lxc-start in daemon mode instead, add configurable log location

Rather than spawning a screen session, start the container in daemon
mode. Write a logfile to ${HA_RSCTMP} by default, but allow the log
file location to be overridden with the "log" parameter.

asp24/resource-agents,stevenraspudic/resource-agents,asp24/resource-agents,stevenraspudic/resource-agents,stevenraspudic/resource-agents,asp24/resource-agents