D23801: Port kpac from QtScript

[Sandro Knauß]

knauss added a task: T11530: Investigate removal of KIO's KPAC in favor of 
QNetworkProxy.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D23801

To: carewolf, dfaure
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns