Merge branch 'devel-2.2'

* devel-2.2:
  NEWS: Add 2.2.0~rc2 release date
  Bump version to 2.2.0~rc2
  Fix mac checker regex
  Remove two old aliases
  Fix migration on new KVMs
  Fix typo in ganeti man page
  cli: Pass options in {Add,Remove}Tags
  Prepare 2.2.0~rc2 release

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>