D25079: [CopyJob] Increase the amount of data sendfile can copy at once

[Méven Car]

meven edited the summary of this revision.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D25079

To: meven, dfaure, #frameworks, davidedmundson
Cc: ahmadsamir, sitter, apol, kde-frameworks-devel, LeGast00n, GB_2, michaelh, 
ngraham, bruns