D19080: [WIP] Make file overwrite a bit safer

[Nathaniel Graham]

ngraham edited the summary of this revision.

REPOSITORY
  R241 KIO

BRANCH
  safe-overwrite

REVISION DETAIL
  https://phabricator.kde.org/D19080

To: chinmoyr, dfaure, ngraham
Cc: kde-frameworks-devel, michaelh, ngraham, bruns