am 5ccb8b8c: merge from open-source master

Merge commit '5ccb8b8c4d6eabcc984559ef9e71efdbb3de00d3' into kraken

* commit '5ccb8b8c4d6eabcc984559ef9e71efdbb3de00d3':
  Fix updating and deleting FDN entries with an empty alpha identifier.
  Abort FDN delete when number is empty (instead of name)