Merge branch 'devel-2.1'

* devel-2.1:
  Bump version to 2.1.0~rc2
  Update NEWS file and release Ganeti 2.0.5
  Doc updates for --no-name-check
  burnin: add --no-name-check support
  CreateInstance: allow no ip check with start mode
  Command line/RAPI support for --no-name-check
  Op/LUCreateInstance support for (no) name checks
  Pass --fqdn to ssh hostname checks
  Security issue: add validation of script names
  Move the hooks file mask into constants.py
  Improve LUQueryNodes for lockless case
  Ship rapi.rst/rapi.html in the dist archive