metrics support for cheaper busyness plugin
Merge pull request #495 from prymitive/busyness_metrics

metrics support for cheaper busyness plugin
added three new emperor hooks
fixed hooks when exit on reload is in place
added --attach-daemon2
implemented touch management for daemons
expose uid gid and pid in subscription nodes
fixed memory allocation in --attach-daemon2
fixed cheaper busyness check
refactored listen queue management
fixed minor bug in listen queue management
getting rid og dynamic options (step 1)
getting rid of dynami options (step 2)
getting rid of dynami options (step 3)
prepare for 2.0-rc1
fixed scripts/tests making use of dynamic options
fixed max worker lifetime
setns-peopen does not take arguments
exit(1) on setns propen failure
cygwin does not support sethostname