D23780: Add new protocol for 7z archives

[Nathaniel Graham]

ngraham edited the summary of this revision.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D23780

To: nhiga, #frameworks, cfeck, pino, dfaure, meven
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns