Merge commit 'origin/next'

Merge commit 'origin/next'

* commit 'origin/next': (74 commits)
  Fix gnt-node modify online help
  Fix gnt-job info entry in gnt-job(8)
  locking: Don't swallow exceptions
  Add check for duplicate MACs in instance add
  scripts/gnt-node: fix a help string
  Optimise multi-job submit
  Extend gnt-debug with more debugging options
  Return cluster tags from LUQueryClusterInfo
  Add script to clean archived jobs after 21 days
  rapi: export more static node information
  Pass the correct signal to handlers
  cli: Use ToStdout/ToStderr instead of print
  Fix small typo in gnt-node
  Simplify handling of boolean args in rapi
  Fix checks in LUSetNodeParms for the master node
  Improve the example startup script
  Fix insserv dependencies
  Fix a typo in InitCluster
  Ignore results from drained nodes in iallocator
  Ship the ethers hook
  ...